Ryan Phillippe went shirtless at the beach with girlfriend Paulina Slagter in Miami, Fla., on Monday, June 9 Credit: Splash News

Ryan Phillippe is just getting hotter with age! The 39-year-old actor went shirtless and looked all kinds of hot at the beach with girlfriend Paulina Slagter in Miami, Fla., on Monday, June 9.

The Secrets & Lies star wore black swim shorts and nothing else, which showed off his buff upper-body and arm tattoos. His 23-year-old girlfriend matched as she wore a chic black bikini.

Days earlier, Phillippe and the law student took a break from getting tan to party at Miami's Wall nightclub on June 7. According to an eyewitness, the lovebirds sipped on Patron and kept it moving on the dance floor.

"They were inseparable and kissing throughout the night," the onlooker told Us Weekly. "They [looked] very much in love."

Phillippe began dating Slagter in December 2011 and has already introduced her to ex-wife Reese Witherspoon, 38, as well as his kids Deacon, 10, and daughter Ava, 14. The Damages actor welcomed daughter Kailani with Pitch Perfect's Alexis Knapp in July 2011. Witherspoon wed CAA agent Jim Toth back in 2011; the couple are parents to 21-month-old son Tennessee.