It was a family affair when "Game Night" star Billy Magnussen stopped by our show -- because not only did he come to see us for the very first time, but so did his mom, dad and brothers!

And since it was his mom, Daina’s, birthday, Rach couldn’t let the visit pass without a little celebration.?

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Not only did she give Daina -- who was sitting in the front row of our studio audience -- a gorgeous bouquet of flowers, but Rach also popped open a bottle of champagne for the birthday girl and the rest of the family.

Aw!

Now, this isn’t the first time Rach has made Billy’s family smile.

The former "American Crime Story" actor took a moment to let Rach know how much our show has meant to his dad.

"I want to say thank you to you and your production," Billy says. "My dad went through cancer [and] watched your show."

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"You made him smile," he sweetly continues. "And I just want to say thank you."

And that, right there, is why we do what we do!