Rob Lowe's Kids Compete in Best Son Challenge on 'The Tonight Show'

Rob Lowe brought his kids Matthew and John Owen to The Tonight Show Starring Jimmy Fallon on Monday (July 24), and put them to the test.

John, 20, and Matthew, 22, agreed to participate in the “Best Son Challenge” to figure out who knows the 52-year-old actor better in support of their new reality A&E series called The Lowe Files.

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The siblings’ answered various questions like: “If a genie could grant Rob one wish, what would he wish for?,” “What makes Rob laugh the hardest?,” and “What is Rob’s hidden talent that not too many people know about?”

So, which son won the game? Watch it all go down below…

Click inside to watch the rest of Rob Lowe’s appearance on The Tonight Show…