Katherine Schwarzenegger shows off baby bump while on bike outing with husband Chris Pratt (Photos)

KATHERINE Schwarzenegger showed off her baby bump while out on a Los Angeles bike ride with dad Arnold and husband Chris Pratt on Sunday.

Her action star father, 72, and the Marvel actor, 40, wore protective gear while the 30-year-old expecting mother did not cover her face despite strict guidelines in the city to do so.

Katherine showed off her growing baby bump on Sunday

She rode around LA with her husband Chris and dad Arnold

The action star rode his bike with his daughter one day after news broke of her pregnancy

Arnold wore a "we'll be back' face mask to cover his mouth

On Saturday, it was revealed the author is expecting her first child

The family rode through the streets of Santa Monica, California this afternoon.

Arnold wore a mask that read “we’ll be back” - a reference to his iconic Terminator movie line - as he rode his bike that featured a large headlight.

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

Mother-to-be Katherine rode alongside him as she showed off her growing bump under a baggy white sweatshirt.

The parents-to-be took a bike ride through LA on Saturday

Hours after her pregnancy was announced, Katherine showed off her bump