We have several new actors in this movie.
We have Dave Legeno, playing Fenrir Greyback. Jim Broadbent plays Professor Slughorn. Helen McCrory finally joins the cast as Narcissa Malfoy. Freddie Stroma and Jessie Cave are students Cormac McLaggen and Lavender Brown. And Hero Fiennes-Tiffin makes a debut as the young Tom Riddle. There are many more, but these are probably some of the main ones.

So how did they fit in? Did they live up to expectations like Imelda Staunton (Umbridge) and Evanna Lynch (Luna) did? Or were they a complete disappointment?

Discuss!!

I think most of the new character's did exceptionally well. I loved how Cormac was a git like he's supposed to be. And Lavender was perfect-i loved the line in the Hospital Wing, "He senses my presence!!!" Classic.

Hero Fiennes-Tiffin definately had the right amount of creepy to play boy Voldemort. Now he was perfect for the role. I think the new actors did really well.

I thought Cormac and Lavender were absolutely spectacular. They were annoying and gross and perfect. Cormac made me laugh a lot...typical slimy guy. Lavender...absolutely repulsive.

Slughorn, I was very pleased with him. I thought his character was funny and nearly spot on, and it kind of makes up for the fact that he has no mustache and that he's not really large.

Hero Fiennes-Tiffin...meh. I wasn't really impressed. I had seen pretty much the entire scene with him in it already from online sneak previews, and I just think that he's boring.

The other kid who played Voldemort was good thought. Looked a bit girly...but he was creepy enough.

I think Fenrir Greyback should have gotten more screen time. I don't think the audience is going to be able to understand how truly horrible he is. I feel like we needed that contrast against Lupin to understand why people in the Wizarding world don't like werewolves.

Overall, i was very impressed with the new characters in the movie!!

I thought that Cormac and Lavender were portrayed perfectly, and also Fenrir Greyback.

I have to say though, professor slughorn irritated me a bit at times throughout the movie. I thought overall he was played very well, but i think he was a little too...doddery and annoying at times.

Does anyone else agree?

Slughorn - As a big fan of Jim Broadbent, I loved him in this role and he has never let me down yet.

Lavender - She was great and annoying, she creeped me a little a bit out to tell you the truth with the window scene.

Fenrir Greyback - Was he even in it? *sarcasm*

Cormac - Yeah he was alright, my friend laughed and pointed at the Quidditch scene saying 'Wow his broom is long'

I think they all did a great job!

Slughorn - I thought he was very good. Liked the Aragog funeral scene. You could see the regret of his memory in his performance.

Lavender - Great choice! Very annoying and clingy. Really liked the hospital scene with Hermione, and all the teachers just standing there...Jessie Cave was better than I thought she'd be.

Cormac: Brilliant. Very cocky and thought a lot of himself. Also very annoying.

Grayback - Didn't see enough of him. What happened to Bill and the getting bitten part?
Are Bill and Fleur ever going to be in HP again?
I think it was a big mistake leaving them out.

The younger Voldemort's played their parts well, I thought.

Great movie! Can't wait to see it again! <3

I too was very impressed and pleased with the new actors performances!

Cormac- Very well done. I liked how he thought so much of himself, the part with the fly and everything, and he also tended to get on my nerves too.

Lavender- Brilliant! She played the role perfectly and I thought that the scenes she was in were very funny. I really liked the scene on the train with the heart, it was pretty hilarious.

Slughorn- I liked him a lot actually. He did a pretty good job playing the part and even though he didn't look as he was described in the book I thought that it was a good performance.

Toms Riddes- Although not my favorite of the new actors, I thought that they too did a good job. I thought that they were both pretty creepy and were great playing the young voldemort.

I think Cormac, Lavender, Slughorn are outstanding for their roles. I thought the young Voldemort was a little creepy - I expected him to be more....handsome i guess. I don't know why, but I didn't really like Tonks in this film. Greyback was pretty dead-on for his role, although he didn't have any lines, he was great.

My favourite newcomer by far was the young actor who played a 16 year old Tom Riddle, Frank Dillane.

A nice looking young man but with a leering pesence which was perfect for the boy Voldemort. I also think that Hero Fiennes Tiffin played an equally creepy young Tom.

I liked the guy who played Cormac as well. He had just the right amount of arrogance for the character!

While Dave Legeno as Fenrir Greyback looked the part, he really didn't get a chance to act did he? He really didn't do anything but stand in the marshes outside the Burrow, and he pulled down a window shade in Burkes. I may have missed it, but I don't believe they even referenced him as a werewolf in HBP. If I hadn't read the books I would have assumed he was just another nameless wand waving death eater.

I love how they portrayed Lavender perfectly. Cormac McLaggen was perfect too, personality wise, but he looks different than I thought he would be. The kid who plays young Voldemort was okay, he was creepy and captured the essence of young Tom Riddle. I wish we had got to see more of Fenrir Greyback.

Hero Fiennes-Tiffin, in my opinion, did a spectacular job portraying a young Voldemort. He had a slightly sinister air about him, and you could sense the underlying resentment toward Dumbledore. His performance was spot-on.

I also thought that Freddie Stroma did a commendable job as Cormac McLaggen. His character was the embodiment of crudeness and arrogance.

Jessie Cave, however, was abhorrent as Lavender Brown. Jessie's Lavender went far beyond the obnoxious and annoying character of the book... she instead portrayed Lavender as far too desperate and idiotic.

I'm gonna take each character one by one, and I'll start with Fenrir.

Just the Droobles said it PERFECTLY:

In my opinion, that's exactly it. In the books, we were told why he was different than the other werewolves, and the description of him biting anyone that came within his range, even not during the time of the full moon, made us understand exactly how much he should be feared, even among the powerful wizards of the time. In the movie, if you weren't paying that much attention, you probably would have missed him, or mistaken him for a normal Death Eater. Also, if you hadn't read the book, you almost were guaranteed to mistake him for something or somebody else. I'm hoping that in both parts of Deathly Hallows, Yates takes the time to explain why we should be afraid of Fenrir, rather than just putting him in the fray of battle and leaving us to draw our own conclusions.

Lavender was amazing. I was expecting, based on how she acted in the books, her role to be completely overdone to the point of ridicule. However, I was pleasantly surprised that she was portrayed so well...just the right amount of annoying and clingy to be true to the role, but not enough to make the viewer cringe and want to walk away.

The two boys who played Tom Riddle were okay, in my mind. They served their purpose, but didn't stand out in my mind. I don't know what would have made me like them more, but all I can do is stand impartial in this situation.

Slughorn, also, was wonderful. I never really liked him in the books, and so I didn't like him here. However, it was the CHARACTER I didn't like. Because the actor that took on the role gave me the same feeling that the Slughorn in the book did, it's clear that Yates and the other casting directors picked a good person to fill the role. (He also looked exactly like I pictured him to in my head, so that's a total plus.)

One person that I thought was nice to add in (and that hasn't been mentioned so far) was Romilda Vane. I LOVED the tangent in the book about Ron eating the potion-filled candies meant for Harry and falling in love with her, and she was put in the movie just the right amount of times to make her presence noticable.

So, I guess, in all, the director's choice in people was a positive one. However, as mentioned above, I think they could have done some things a little better.

I liked Cormac he was suppose to be arogant and a git. he did it well. I also liked Lavender. I think she did well in making her annoying and acting like an air head. The best new one was Slughorn. He really made him act like a collector. I enjoyed watching his performance the best.

the fenrir greyback they chose for the role i believe was perfect. lavender at first seing the pics of the actress long before the movie came out i was a little skeptical about. im happy to say after seeing the movie all my doubts about her were gone she portrayed lavender well and it was very funny. i think slughorn was fantastic absolutely brilliant! he didnt look at all how id imagined slughorn but i must say he pulled it off very very well. i think all the new characters did great and were good for the roles they were cast as

Yep, Fenrir was good, indeed. I also liked Lavender, but why did they change the previous actress? She was annoying enough, but I think it was a bit too much of her. In that time we could've seen e.g. the house elves. I know what was the reason for this, they wanted to make a snogging movie, clear, but some scenes with Harry and Ginny were maybe a bit overacted, like with the shoelaces.

I also loved Slughorn, for me he wasn't like I expected, but he did a good job. And the Sluggish memory scene, when it was modified, it sounded very nice!

I really liked Jim Braodbent as Slughorn if they just had added a mustach it wouldv´e been perfect.

Jessie Cave was funny but perhaps a little too over the top to be beliveble.

Freddie Storma who played Comac was pretty good as well and had some really funny scenes.

I can´t say much about Fenrir since besides standing around and looking evil he didn´t have alot to do, also am I the only one who thought he looked like sabretooth from the first X-men movie?

Slughorn: Perfect! he wasnt nearly as fat as he was in the book but he still had this: "O_o HARRY MAH BOI!" and thats what mattered! I loved his goofy expressions.

Lavender Brown: LOL! Just as retarded as she is in the book. I imagined her as unattractive and bitterly annoying and lo! Ask and i shall receive!

Cormac: Ha! He was decent and silly.

Narcissa: Not exactly how i imagined. I thought she would be quite good looking but she had the snobbish appearance down. I was just thrilled to finally get her in the movie!

Greyback: Crappy character gets crappy movie introduction. I depise that character almost as much as Bellatrix so i was thrilled to see him get nerfed and ugly.

Little and Teen Voldy: An improvment on the CoS teen Voldy. Much more evil looking and seemed to capture the essence of Voldy.