Arnold Schwarzenegger cruises on his bike in a Terminator T-shirt

It’s Grandpa Arnie! Schwarzenegger shows off his muscular arms in a Terminator T-shirt… after news of daughter Katherine’s pregnancy

The Schwarzenegger family is celebrating amid news Katherine is expecting her first child with her husband Chris Pratt.

But while he’s soon to become a Grandpa, Arnold Schwarzenegger proved he’s still an action hero, as he showed off his muscular arms in a Terminator T-shirt while on a bike ride on Saturday. 

The 72-year-old former Governor of California was spotted by the sea in Santa Monica on his fat-tire bike while wearing a mask to help slow the spread of the coronavirus.

Weekend ride: Arnold Schwarzenegger, 72, got in some physical activity with a bike ride around Santa Monica on Saturday, after his daughter Katherine’s pregnancy with Chris Pratt was announced

Schwarzenegger repped his most recent turn as the iconic killer robot with a black Terminator: Dark Fate T-shirt.

He also had on a black face mask with the phrase ‘We’ll Be Back’ over one cheek, a paraphrase of his iconic ‘I’ll be back’ line from the the first Terminator film.

He capped off the casual outfit with a black ‘Sheriff’ baseball cap, charcoal shorts and a silver luxury wristwatch.

He rode on a rugged camouflage bicycle with a fat tire capable of driving well off-road or on the beach. 

Classic: Schwarzenegger repped his most recent turn as the iconic killer robot with a black Terminator: Dark Fate T-shirt

Classic: Schwarzenegger repped his most recent turn as the iconic killer robot with a black Terminator: Dark Fate T-shirt

Quotable: He also had on a black face mask with the phrase 'We'll Be Back' over one cheek, a paraphrase of his iconic 'I'll be back' line from the the first Terminator film

Quotable: He also had on a black face mask with the phrase ‘We’ll Be Back’ over one cheek, a paraphrase of his iconic ‘I’ll be back’ line from the the first Terminator film

Rugged: He capped off the casual outfit with a black 'Sheriff' baseball cap, charcoal shorts and a silver luxury wristwatch. He rode on a camouflage bicycle with a fat tire capable of driving well off-road or on the beach

Rugged: He capped off the casual outfit with a black ‘Sheriff’ baseball cap, charcoal shorts and a silver luxury wristwatch. He rode on a camouflage bicycle with a fat tire capable of driving well off-road or on the beach

Though Schwarzenegger is famous for pumping iron, he’s had to go out more to get in his physical activity as gyms have been closed throughout Los Angeles.

The Total Recall star often likes to work out with lookalike son Joseph Baena, 22, and the two haven’t held off their meet-ups since the start of the coronavirus pandemic.

Arnold and Joseph was spotted out together on Friday when they went for a bike ride together.

Despite the actor and politician’s advanced age, which leaves him at risk of serious COVID-19 symptoms, he didn’t always wear his mask around his son and didn’t appear to consistently maintain a six-foot distance.

Prior to heading out on their bikes, he was spotted doing some preparatory stretches by his SUV. 

Alternative exercise: Schwarzenegger has turned to riding his bike while gyms are closed. He met up with his lookalike son Joseph for a ride on Friday

Alternative exercise: Schwarzenegger has turned to riding his bike while gyms are closed. He met up with his lookalike son Joseph for a ride on Friday

Staying in shape: The Total Recall star was spotted doing stretches by his SUV before zooming away

Staying in shape: The Total Recall star was spotted doing stretches by his SUV before zooming away

Schwarzenegger’s ride on Friday came shortly after People reported that his daughter Katherine Schwarzenegger was expecting her first child with her husband Chris Pratt. 

The couple married in June 2019, with a ceremony in Montecito, California.

Their child will be the first for Katherine and the second for Chris, who shares his seven-year-old son Jack with his ex-wife Anna Faris, whom he was married to from 2009 to 2018.

Katherine was spotted out on a stroll on Saturday with her journalist mother Maria Shriver while sporting was seemed to be a baby bump.

Shriver married Schwarzenegger back in 1986, though they separated in 2011 after he admitted fathering his son Joseph with their housekeeper.

The couple’s divorce wasn’t finalized until 2017.

Happy news: Earlier Saturday, his daughter Katherine Schwarzenegger was reported to be having her first child with husband Chris Pratt. It's his second after his son Jack, seven; pictured in 2019

Happy news: Earlier Saturday, his daughter Katherine Schwarzenegger was reported to be having her first child with husband Chris Pratt. It’s his second after his son Jack, seven; pictured in 2019

Cute buddies: Arnold made a lovable appearance with his pet donkey Whiskey and miniature horse Lulu on The Tonight Show With Jimmy Kimmel on Thursday night

Cute buddies: Arnold made a lovable appearance with his pet donkey Whiskey and miniature horse Lulu on The Tonight Show With Jimmy Kimmel on Thursday night