The 20-year star could barely keep his hands off his model girlfriend Nicole Pedra as they holidayed on the island of Maui on Tuesday.
At one point, the couple indulged in a spot of paddle boarding with Nicole lying down and Alexander doing the work.
Paddle boarding: Alexander Ludwig and girlfriend Nicole Pedra enjoyed some sporty activities on holiday in Hawaii on Tuesday
Later, the couple took to their own separate boards, chatting and laughing as they paddled along in the warm ocean.
The blonde actor, who sported a pair of bright pink swimming trunks, then gave his giggling beau a piggy back ride - showing off his strength as he jogged out of the water.
It seems he couldn't stop himself from carrying his feather-light girlfriend - holding her in his arms after she dressed in a pair of shorts and top over her white bikini.
The ride of your life: Alexander showed off his strength as he gave Nicole a piggy back ride
Helping hand: The couple both balance on the surf board, with the actor offering his beau a helping hand
Bobbing along: The couple laughed and chatted as they took to their boards
Ludwig asked a fan to snap a picture and Nicole jumped into his arms so the actor could lift her in the air.
The motion was an effortless one for the chiselled young actor, who began dating Nicole last September.
Thinking pink: The star showed off his six pack as he took to the board in cerise shorts
All aboard! Nicole showed off her svelte figure in a white bikini
What a carry on! Alexander couldn't resist picking Nicole up yet again later in the day
The pair have been inseparable during the winter holidays, vacationing in Hawaii after their romantic Whistler ski vacation in his native Canada.
And it didn't take long for the former Disney star to enjoy a sunset dip in the Pacific Ocean with Nicole where the affectionate couple locked lips after jogging along the shore line path.
Let's do this! Alexander prepared to lift Nicole in a dramatic swoop of the ocean on Monday
I'm flying! Fans took pictures nearby as the model was swept up into the air
The PDA-loving pair, both sporting iPod ear buds, even spotted some whales along the way.'En route to Hawaii. Hope everyone had an incredible NYE. So fortunate to have you unreal fans in my life. #love to you and your loved ones,' the actor tweeted to his 279,000 followers last week.
Nicole, who's also a sales rep for Isola Shoes, now refers to herself as the 'happiest girl in all the land' since meeting the actor.
Ludwig previously romanced his Hunger Games co-star Leven Rambin and he dated AnnaSophia Robb, the star of The CW's The Carrie Diaries, for nearly three years.
Coupled up: The 20-year-old actor held hands with girlfriend Nicole
Bikini babe: Nicole and Alexander have been dating since last September
Something to prove: The actor's father Harald Horst Ludwig is the Co-Chairman of the Board for Lions Gate Entertainment Corp, which produces The Hunger Game filmsHollywood is not entirely foreign to the Race to Witch Mountain actor - his father Harald Horst Ludwig is the Co-Chairman of the Board for Lionsgate Entertainment Corp, which produces The Hunger Game films.
Alexander's role as Cato, the last to die in the film, earned him awards for Best Fight at the MTV Movie Awards and Best Villain at the Teen Choice Awards last year.
The busy blond beefcake has three films due out this year - the Adam Sandler comedy Grown Ups 2, the indie revenge thriller Final Girl with Abigail Breslin, and the action-thriller Lone Survivor with Mark Wahlberg.