Laura Breckenridge is playing Mary, a well-to-do college student who hits a man while driving home drunk from a party, in MGM's "Bumper," directed by Enda McCallion. Breckenridge, whose credits include WB Network's "Related," also will appear in the upcoming "The Favor" and "Amusement." She is repped by Gersh, Rigberg Entertainment and attorney James Adams. … Liza Lapira, best known for her role as Oliver Platt's quirky assistant on Showtime's "Huff," has joined Jude Law and Forest Whitaker in the sci-fi thriller "The Repossession Mambo" for Universal. Lapira will play an anesthesiologist who performs surgeries on artificial organ recipients. She recently finished "See You in September" and appears in Sony's upcoming "21." She is repped by APA and Jaymes/Nelson Entertainment. … Toni Trucks ("Music and Lyrics," Showtime's "Barbershop") has wrapped production on three indie films: "Mr. Art Critic," "Hitting the Bricks" and the comedy "Pizza With Bullets," in which she appears opposite Talia Shire and Vincent Pastore. Trucks is repped by Henderson/Hogan Agency and Rugolo Entertainment. … Matt Frewer has been cast as Moloch the Mystic, a satanic supervillain and magician, in the Zack Snyder-directed "Watchmen" for Warner Bros. Frewer, whose credits include "Dawn of the Dead," is repped by Gordon Gilbertson. … Siobhan Fallon Hogan has joined Renee Zellweger and Harry Connick Jr. in the romantic comedy "Chilled in Miami." Hogan, whose credits include "Fever Pitch" and "Dogville," will play Blanche Gunderson, the executive assistant and friend to Zellweger's character. She is repped by Stone Manners Agency. … Champion bodybuilder Tino Struckmann has been cast as a private eye/bodyguard in the dark thriller "Stranahan," which Warren Lewis is writing and directing. Struckmann recently completed production on "Brothers War," a World War II epic. … Jim Gaffigan has joined New Line's "17" as Coach Murphy, marking the second time Gaffigan will work with director Burr Steers. Gaffigan also will play hockey commentator Trent Leuders in Paramount's comedy "The Love Guru." He is repped by CAA and manager Alex Murray. … Melissa-Anne Davenport will play a neurotic girl in the feature "Dirty Politics," from writer-director Steven Esteb. She joins Judd Nelson, Melissa Peterman ("Reba") and John Valdetero. Davenport, whose credits include "Gridiron Gang," "Tenacious D in the Pick of Destiny" and the recent urban horror film "Holla" from Lionsgate, is repped by Jason Priluck of the Agency Group and manager Richard Kerner.