Sienna Miller showed that she continues to stay in shape when stunning in a tiny bikini while on vacation this past weekend.

The 33-year-old "American Sniper" actress rocked a snakeskin string bikini on Friday while swimming in the ocean in Ibiza, Spain, according to People. She was on vacation with her partner Tom Sturridge, and they were really enjoying their time in the sun.

Miller herself already has a lot going on this summer. In May, she joined the official jury for the Cannes International Film Festival, and she will soon start filming "The Lost City of Z," which will be produced by Brad Pitt. She will be starring along side Robert Pattinson and Charlie Hunnam from "Sons of Anarchy."

Miller has been speaking out about how she continues to stay in shape since the birth of her 2-year-old daughter Marlowe, according to Us Weekly.

"It's hard, because there's just no structure to my day," she told Jollie, a German magazine. "With a child and my job, I have enough to do, I can't always make it to the gym. I do try to do something with my trainer Efua Baker every now and again, preferably yoga, but that's not enough of course."