Allison Brooks Janney (born November 19, 1959) is an American actress. A seven-time Primetime Emmy Award winner for her television work, her first four Emmy wins were for her role as C. J. Cregg on the NBC drama The West Wing (1999–2006). In 2014, she won the Emmy for Outstanding Guest Actress in a Drama Series for her role as Margaret Scully on the Showtime series Masters of Sex. In 2014 and 2015, she won the Emmy for Outstanding Supporting Actress in a Comedy Series for her role as Bonnie Plunkett on the CBS sitcom Mom (2013–present).
Janney, who won a scholarship to study at the Royal Academy of Dramatic Art in the summer of 1984, made her Broadway debut in the 1996 revival of Present Laughter. She won Drama Desk Awards for the 1997 Broadway revival of A View From the Bridge, and the 2009 original Broadway production of the musical 9 to 5. She also received Tony Award nominations for both.
Her film roles include Primary Colors (1998), Drop Dead Gorgeous (1999), 10 Things I Hate About You (1999), The Hours (2002), Finding Nemo (2003), Hairspray (2007), Juno (2007), The Way, Way Back (2013), Mr. Peabody and Sherman (2014), Tammy (2014), Get On Up (2014), Spy (2015), Finding Dory (2016), The Girl on the Train (2016), Tallulah (2016), and I, Tonya (2017). She won Screen Actors Guild Award for Outstanding Performance by a Cast in a Motion Picture for her roles in American Beauty (1999) and The Help (2011).