Happy Birthday, Jennifer Aniston! Her Best On-Screen Moments

Never doubt Aniston can seriously act. During a Season 8 episode of “Friends” in 2001, the actress showed off her chops in an emotional moment. Anyone can fill a pregnancy scene with tears and shouting, but watching Phoebe trick Rachel into believing she isn’t pregnant before revealing she is, well that’s an emotional rollercoaster for Aniston and for viewers.

Aniston showed up on “30 Rock” as Crazy Claire, Jack’s unhinged love interest. Despite his efforts to break it off with her, Claire refuses to quit, breaking into his house to accost him with all sorts of weird. It’s Aniston playing right into her manic stereotypes, proving she has the last laugh every time.

Aniston is the best of us in a bad job. The running joke about pieces the pieces of flair on her uniform ends when Aniston finally up and quits. She walks out with a finale of obscene flair and pulls it off with angry grace.

Rachel and Ross go through a lot of the 10 seasons of “Friends,” but their Season 3 breakup is easily one of the most emotional moments in the relationship and the show overall. It takes a lot of chutzpah to end a cherished TV relationship but Aniston pulls it off. David Schwimmer … helps.

Rachel and Monica may be the tightest of the pals on “Friends,” making it hilarious to watch Courtney Cox and Aniston spoof the fallout in an unfaithful romantic relationship. The two fight over Monica going shopping with another woman (Julie, who’s dating Ross), but every line -- “It didn’t mean anything to me,” “you wanted to get caught,” “I was thinking of you the whole time” -- add up to a pretty funny scene.