ARNOLD Schwarzenegger covered up with a face mask during a bike ride with his son David Baena on Friday in Santa Monica, California.

The 22-year-old opted to go on the outing with no protective gear as his dad, 72, wore a mask that read “we’ll be back” – a reference to his iconic Terminator movie line.

Arnold rocked a black “Arnold Classic” t-shirt with a model shot from his body-building days printed on the front.

David helped his dad load their bikes onto a SUV and wore a black shirt and denim shorts for the LA ride.

Their father-son outing comes as news broke that Arnold’s daughter Katherine Schwarzenegger, 30, is expecting her first baby with actor Chris Pratt.

The 40-year-old actor and his wife are reportedly pregnant ten months after they wed last June, according to People.

It will be the first child for Katherine and the second for Chris – who shares seven-year-old son Jack from actress and ex wife Anna Faris.

Just after their pregnancy news broke, the parents-to-be were also spotted taking a bike ride around their LA neighborhood.

The expecting-mother did not wear a protective face mask on the outing despite strict guidelines to do so in the city.

Katherine debuted her baby bump in a loose-fitting white t-shirt and stretchy yoga pants.

Chris covered up his face with an American flag bandana and black sunglasses.

The best-selling author is one of five kids from the movie-star-turned-politician.

The former Governor of California also shares sons Patrick, 26, Christoper, 22, and daughter Christina, 28, with ex wife Maria Shriver.

In 2011, Arnold announced he fathered David 14 years earlier with household employee Mildred Patricia Baena after having a secret affair.

Mildred worked for the family for 20 years before her retirement in January 2011 – the same year news broke of David’s father.

The action star revealed he didn’t know the boy was his until he “started looking like me.”

Following the news, the movie icon split from former wife Maria after 25 years of marriage.

Arnold has spent time building his relationship with his son over the years and frequently are seen together.

David has resembled his father more and more as he’s grown and recently showed off his incredible body in a topless muscle shot.

He appeared reminiscent of his famous father as he pumped iron at his massive home gym in LA.

David flaunted his physique in numerous body-building shots that are nearly identical to his dad – who won Mr. Universe at the age of 20.

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