What's Your Number? (2011) is a charming romantic comedy that puts a fresh spin on the quest for love. The film follows Ally Darling (Anna Faris), who, after reading a magazine article claiming women with 20 or more sexual partners are unlikely to marry, panics about her own number of 19. Determined not to become number 20, she embarks on a mission to revisit all her ex-boyfriends, convinced that one of them might be 'The One' she overlooked.

Anna Faris delivers a hilarious and relatable performance as the endearingly chaotic Ally, perfectly matched by Chris Evans as her womanizing neighbor Colin, who agrees to help her track down her former flames. Their chemistry is the film's greatest strength, providing both laugh-out-loud moments and genuine romantic tension. Director Mark Mylod keeps the pace brisk and the tone light, balancing slapstick comedy with heartfelt moments of self-discovery.

The film's premise allows for a delightful parade of cameos from actors playing Ally's diverse exes, each encounter revealing something about her past and present self. While following familiar rom-com conventions, What's Your Number? stands out with its frank discussion of modern dating anxieties and its message about self-acceptance. The Boston setting adds character, and the costume design cleverly reflects Ally's journey from insecurity to confidence.

Viewers should watch this movie for its winning combination of humor and heart. It's a perfect choice for anyone who enjoys character-driven comedies about personal growth, with enough romantic spark to satisfy genre fans. The film reminds us that sometimes looking backward helps us move forward—and that true love might be closer than we think.