Olivia Wilde Rang In Her 39th Birthday With A Sultry White Bikini Pic—Is That A Butt Tattoo?

After recently stunning in a daring leather bra and white dress for the Vanity Fair Oscars Party, it seems Olivia Wilde is taking a break from press tours and red carpet looks. She jetted off on a beach vacation with her best friend, Molly Howard. The actress-filmmaker celebrated her 39th birthday (which is on March 10) while on vacation and shared a sultry swimsuit pic with Molly on Instagram to mark the occasion afterward.

READ MORE: Olivia Wilde Bares It All In A Black Sheer Lace Dress At The People’s Choice Awards

The bikini selfie was black-and-white and showed Olivia and Molly posing for the camera on the beach. The photo was taken from behind so the Booksmart director flaunted her backside and dragon tattoo as she adjusted her itty bitty white string bikini. The sultry swimsuit showed off her toned legs and back. Her long bronde (or the universally flattering blonde and brunette hair!) tresses cascaded down her back in beach waves. Molly stood at her side, facing the camera in a light, bandeau bikini with a pair of black sunglasses and a woven hat on top of her blonde hair to complete the look.

Olivia turned 39 on March 10, but she kept the celebratory vibes going on her tropical getaway. She captioned her belated birthday post, “39 and feeling fine. Thanks for the birthday love. I milked it for way too long and it’s been great. Here’s to whatever’s next. Probably not another tramp stamp but who knows? #shameless #howdareshe #thehorror,” with a white heart emoji.

The actress has actually had her “tramp stamp” dragon tattoo for a while. She spoke about the ink in a 2017 interview with talk show host Craig Ferguson. “I have one really bad one,” she said when The Late Late Show host asked if she had any tattoos. Olivia confessed that she got “a tattoo of a dragon” when she was just 13. She coyly said that she was in New York City and “thought it was a great idea, it had a lot of meaning at the time but now it’s hideous.” Olivia continued, “It’s not a tramp stamp! It’s over to the right. It’s an a– stamp, which is probably a lot classier.”

Although she limited comments (maybe because of drama with her ex Harry Styles or the conflict with Don’t Worry Darling star Florence Pugh), plenty of Olivia’s 4.2 million celebrity friends and followers quickly rushed to the comment section to compliment the actress-director. The photo racked up over 100 thousand likes.  “I’d put a TA on that cute booty! 39 is such an awesome age!!!” fitness entrepreneur Tracy Anderson commented. “It’s a wow and a lean back and a wipe the sweat from my brow from me,” author Jedidiah Jenkins jokingly wrote. “Yasssssssss,” stylist Karla Welch encouraged. “Baby,” author Kelly Oxford wrote. “Lookin’ real fine!” a commenter wrote, while another congratulated Olivia for another year around the sun,  “Happy Birthday beautiful!”