"Sometimes you just gotta get a little funky, in public I guess," Biel tells DeGeneres.
The Book of Love star quips that she and Timberlake were "having a very serious political conversation," when cameras caught them dancing at a game between the Los Angeles Lakers and the Memphis Grizzlies.
Biel had no idea that the dance with her hubby was being recorded, and she also missed the pregnancy rumors that were sparked after Timberlake was snapped with his arms around her waist.
“What a good surprise,” Biel replies when DeGeneres pretends to congratulate her on the news. “I knew you were going to tell me some good news when I was here.”
DeGeneres even grabs Biel’s phone to prank call Timberlake with the baby news, but he doesn't take the bait.
"I can't wait to find out whose it is," says Timberlake, who was at home making sweet potato fries for their nearly 2-year-old son, Silas.