The Mad Men creator and his wife were at the Los Angeles ceremony, where the AMC hit was nominated in the drama series category.
Michael Barker, Richard Linklater and Ethan Hawke
From left: Michael Barker,co-president and co-founder of Sony Pictures Classics, hit the WGA East red carpet with RichardLinklater and EthanHawke, who were nominated along with JulieDelpy for writing Before Midnight.
The actor, who is married to MeganMullally, is best known for his role as Ron Swanson on Parks and Recreation.
David O. Russell and Holly Davis
David O. Russell, a WGA Award nominee for AmericanHustle, attended the WGA West awards show with partner Holly Davis.
JulieDelpy was nominated for adapted screenplay for BeforeMidnight alongside RichardLinklater and EthanHawke.
Brad Garrett and Isaball Quella
BradGarrett, who hosted the WGA West awards show, walked the red carpet with girlfriend Isaball Quella.
The TrueBlood star posed for photographers in Hollywood.
The actress, who stars on FX's The Americans, attended WGA East's ceremony.
Breaking Bad's Betsy Brandt hit the red carpet at the WGA West's ceremony.
June Squibb,at the WGA West ceremony, is nominated for an Oscar for her role in Nebraska.
The Orange Is the New Black creator was nominated for co-writing the Netflix show's pilot. The dramedy was also up for best new series, but lost out to Netflix sibling House of Cards.
Actress Jennifer Tilly hit the red carpet at the WGA West's ceremony. She most recently guest-starred on ABC's Modern Family.
Emily Mortimer and Alessandro Nivola
The Newsroom actress and her actor husband attended the New York ceremony.
The August: Osage County actor looked sharp in a smart suit.
Two and a Half Men actress Amber Tamblyn wore black and white to the L.A. ceremony.
The Justified actor posed on the red carpet in Hollywood.
Therapy? Yep, the 'Still Alice' star has had plenty. And now, today, the onetime outsider is a five-time Oscar nominee who also believes in family and the ability to control her own fate: "I've completely created my own life. Structure, it's all imposed." Watch video