The couple also got a chance to take some fun pictures with the Democratic presidential nominee.
Both 35-year-old Timberlake and Biel, 34, took to their respective social media accounts to share the photographs.
The couple and Clinton are seen making some funny faces as they pose in a photo booth.
"Look who came over for lunch... #imwithher," Biel captioned her Instagram post.
The Tuesday fundraiser was supposed to be held at Leonardo DiCaprio's home. The 41-year-old "Titanic" actor, however, had to cancel it as he's "stuck" in New York to continue working on a project until Wednesday.
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