John Lithgow is returning to "How I Met Your Mother" for the show's final season, according to The Hollywood Reporter.
Lithgow plays Barney's (Neil Patrick Harris) father Jerry Whitaker. The final season of "How I Met Your Mother" will take place over one weekend, the wedding of Barney and Robin (Cobie Smulders). Wayne Brady, who plays Barney's brother, will also appear in the final season. Other guest stars include Sherri Shepherd and Ellie Kemper.
Shepherd will play a woman who's on a plane with Jason Segel's character. Kemper, who just wrapped "The Office," will play Cassie, a guest at the wedding.
"How I Met Your Mother" returns for its final season Monday, Sept. 23 at 8 p.m. ET on CBS.