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Jimmy Kimmel, Sarah Silverman, GQ Awards

Michael Buckner/Getty Images for GQ

Sarah Silverman and Jimmy Kimmel like to keep us guessing. The former couple, who announced in July that they were calling it quits after five years together, showed up arm-in-arm to last night's GQ Men of the Year party at L.A.'s Chateau Marmont hotel.

They smiled and posed together for photographers on the red carpet but declined joint interviews.

Once inside the star-studded bash, they held hands while talking to GQ editor-in-chief Jim Nelson.

Later on, Silverman was spied planting a sweet peck on Kimmel's lips. They also chatted with Mad Men star Jon Hamm, who is one of the magazine's four cover stars (the other three are Leonardo DiCaprio, Michael Phelps and President-Elect Barack Obama.)

Shortly before leaving, Kimmel and Silverman once again had their arms around each other while chatting with Lost star Matthew Fox.

Kimmel's rep declined to comment about his client's relationship with Silverman.