Kellan Lutz shows off his killer abs while going shirtless at Cronulla Beach with his bikini-clad girlfriend Sharni Vinson on Sunday (December 23) in Sydney, Australia.

The 27-year-old Twilight actor is spending the holidays in his gal’s hometown this year!

Last week, Sharni finished work on her new film Patrick.

“THAT’S A WRAP on the #PATRICK remake!! Thank you to all the cast and crew who made this experience so enjoyable! I miss you already!” Sharni tweeted.

25+ pictures inside of Kellan Lutz and Sharni Vinson at the beach…