Cast of Knocked Up

Seth Rogen portrays Ben Stone, a laid-back, underachieving slacker who finds his life turned upside down when a one-night stand leads to a pregnancy.

Katherine Heigl plays Alison Scott, an ambitious and career-focused media personality who becomes pregnant after a casual encounter with Ben Stone.

Paul Rudd plays Pete, the brother-in-law of Ben Stone, whose own marital struggles provide a humorous counterpoint to Ben's situation.

Leslie Mann portrays Debbie, the sister of Alison Scott and wife of Pete, dealing with her own family and marriage complexities.

Jason Segel plays Jason, one of Ben Stone's goofball friends who often gives him questionable life advice.

Jay Baruchel portrays Jay, a friend of Ben Stone's who is part of his close-knit, immature group.

Jonah Hill plays Jonah, another friend of Ben's who partakes in his circle's antics and misguided support.

Martin Starr plays Martin, a member of Ben Stone's eccentric friend group, often seen struggling with his own quirks and opinions.

Charlyne Yi portrays Jodi, a friend of Ben Stone characterized by her odd behavior and unique outlook on life.

Iris Apatow plays Charlotte, the young daughter of Debbie and Pete, navigating childhood amidst the adult chaos.

Maude Apatow portrays Sadie, the oldest daughter of Debbie and Pete, facing the typical challenges of a preteen.

Joanna Kerns plays Alison's Mom, the mother of Alison Scott, offering her perspective and advice following the unexpected pregnancy.