Sienna Miller Rocks a Bikini While Hitting the Beach in Mexico!

Sienna Miller looked stunning while hitting the beach during her vacation!

The 37-year-old actress was spotted enjoying some downtime on Friday afternoon (March 22) in Tulum, Mexico.

PHOTOS: Check out the latest pics of Sienna Miller

Sienna showed off her figure in a pink and red bikini as she took a dip in the water.

She was also joined by some friends as well as her six-year-old daughter Marlowe (not pictured).

Earlier in the month, Sienna was spotted spending time with boyfriend Lucas Zwirner in New York City. Make sure to check out the cute pics!