He's one of the most famous action stars of all time.

And Arnold Schwarzenegger was ensuring he remains in great shape for his demanding film roles, taking his bicycle for a spin around Los Angeles on Friday.

The 68-year-old Terminator favourite was seen enjoying an afternoon cycle around town, donning a casual ensemble to work up a sweat.

Scroll down for video

Laid-back outing: Arnold Schwarzenegger took his bicycle for a spin around Los Angeles on Friday afternoon

Schwarzenegger displayed his muscular physique in a pair of grey shorts and a bright blue T-shirt, topped topped with a leather bomber jacket.

The screen star completed his sporty look with a designer watch and leather loafers.

The muscleman seemed in great spirits as he cycled along, flashing a coy smile during his bike ride.

In great shape: The Terminator favourite displayed his muscular physique in a pair of grey shorts and a bright blue T-shirt

Muscleman: Arnie was ensuring he remains in great shape for his demanding film roles

Arnie certainly hasn't slowed up on the film front.

He will next appear in comedy Why We're Killing Gunther except that he plays the titular character and the film stars Cobie Smulders and Taran Killam.

He's not even sticking to one genre because Arnold starred in a thriller, 478, a fantasy adventure, The Legend of Conan, and another comedy, Triplets, in 2015, too.

In demand: Arnie certainly hasn't slowed up on the film front and will next appear in comedy Why We're Killing Gunther

Arnold recently reunited with his ex Maria Shriver at their son Patrick's graduation.

The pair - who split in 2011 - attended the University of Southern California's commencement ceremony to support their son Patrick.

In a photograph posted on Instagram, any strife appeared to be water under the bridge, as the proud parents stood on each side of their son and offered words of encouragement.

Casual attire: The screen star completed his sporty look with a designer watch and leather loafers

Schwarzenegger wrote a touching tribute that read: 'Patrick, I'm so proud of you.

'You have grown into a great man - physically and mentally - and I can't wait to see what you do next. Congratulations. I love you.'

Patrick, who previously dated Miley Cyrus, is taking after his father and building up his own acting chops by landing a role on the TV show Scream Queens.