Anne Hathaway is joining the cast of Universal Pictures' "Knocked Up."

The actress, who most recently played Jake Gyllenhaal's icy wife in "Brokeback Mountain," is set to star opposite Seth Rogen, Paul Rudd and Leslie Mann in the Judd Apatow romantic comedy.

Apatow is writing, producing and directing the movie, which follows a twentysomething guy who finds out he impregnated his one night stand. The picture will be similar in budget to his last film, "The 40-Year-Old Virgin," which grossed $109.5 million at the domestic boxoffice and garnered a WGA nomination.

Shooting is slated to start in the early summer.

Shauna Robertson also is producing "Knocked Up," while Rogen and Evan Goldberg are executive producing.

Universal president of production Donna Langley, senior vp production Holly Bario and creative executive Erik Baiers are overseeing for the studio.

Hathaway, who made her feature debut with the Walt Disney Co. hit "The Princess Diaries," will next be seen in "The Devil Wears Prada." She is repped by CAA and Management 360.