Lonely, He's Not: Paul Weitz Recruits Familiar Film Actors to Star in His New Play February 28, 2012, 12:34 pm Topher Grace, who took many a bong hit as the sweetly geeky Eric Forman on the Fox series "That "70s Show," will continue his string of anxiety ridden characters in his professional stage debut this spring in Paul Weitz's new comedy "Lonely, I'm Not" at Second Stage Theater, the Off Broadway company announced on Tuesday. Mr. Grace, 33, will play Porter, who once earned seven figures in corporate America but is now trying to rebuild his life after a divorce and a nervous breakdown. Starring opposite Mr. Grace will be Olivia Thirlby as a young businesswoman with her own troubles. Ms. Thirlby is perhaps best known as the friend of the title character in the 2007 film "Juno," and also played a comely campaign intern in the Off Broadway production of "Farragut North" in 2008. Both actors have worked before with Mr. Weitz, a writer and director who shared an Academy Award nomination for adapted screenplay in 2002 for "About a Boy." Mr. Grace starred in Mr. Weitz's film comedy "In Good Company" in 2004 and Ms. Thirlby is among the cast in his coming movie "Being Flynn." "Lonely, I'm Not," to be directed by Trip Cullman ("Assistance"), is to begin preview performances on April 10 and open on May 7. Second Stage previously mounted three other Weitz plays: "Privilege," "Show People," and most recently "Trust," starring Zach Braff.