Jon Cryer stars as Alan Harper on Two and a Half Men.  Alan is charlie's less successful younger brother.  Alan moves in with Charlie after his divorce from his first ex-wife, Judith.

Alan has weekend custody of his son, Jake, who lives with him at Charlie's.  Alan is a chiropractor, yet due to his alimony payments, is struggling and has to depend on his brother.

Alan gets married and divorced a second time to the very young and attractive, Kandi.  He's lovable and annoying at the same time.

Alan Harper Quotes

Alan: Look, I appreciate your feelings for me, but I have to tell you, I really think your daughter deserves a lot of respect. I mean, it takes real courage to make changes in your life and not worry what everybody thinks.
Judith: Thank you, Alan.
Evelyn: That's true. The lesbians of my generation where to scared to come out of the closet.
Lenore: Does that mean what I think it means?
Alan: You haven't told them?
Judith: No. I thought it would be more appropriate coming from your mother.
Evelyn: Oh, I'm sorry. Did I faux pas?

Alan: What's wrong with him?
Berta: Classic case of va-jay-jay fever.
Alan: Colorfully put. I'm just surprised to see Charlie fall for it.
Berta: Sooner or later all men fall for it. How do you think I got my condo in Palm Springs?
Alan: You have a condo in Palm Springs?
Berta: No, figure of speech. Don't try to stop by.