(CNN) – It's not how you'd expect a supermodel to spend her 21st birthday.
Kate Upton, made famous by the Sports Illustrated swimsuit edition, rang in the big day with her uncle, GOP Rep. Fred Upton of Michigan and GOP Whip Kevin McCarthy.
McCarthy, who's the number three Republican in the House, posted a photo of the trio on his Instagram page.
"With Congressman Fred Upton and his niece, Kate. We are celebrating Kate's .21st Birthday #kateupton," McCarthy wrote.
Rep. Upton and McCarthy most recently wrote an op-ed together in the Jan Jose Mercury News, decrying the effects of Obamacare in California. It appeared last week.
CNN's Deirdre Walsh contributed to this report.