She is expecting her first child with husband, Chris Pratt, any day now.
And Katherine Schwarzenegger put her growing bump on display during her daily walk with a friend on Sunday morning.
The 30-year-old beauty dressed in head-to-toe black while out and about her Los Angeles neighborhood with a mask over her face.
Mom-to-be: Katherine Schwarzenneger was spotted putting her baby bump on display on Sunday morning while out with a friend
Katherine sported a black T-shirt and teamed the look with a pair of full-length maternity tights.
The author completed her look with sneakers and accessorised with a cap and shades over her face.
Her brunette tresses were styled back into a messy bun and she appeared to be makeup free.
Bumping along: Katherine sported a black T-shirt and teamed the look with a pair of full-length maternity tights
Biking: Also out and about on Sunday morning was her dad, Arnold Schwarzenegger, who has regularly been seen out in Los Angeles on bike rides with his kids on separate occasions
Also out and about on Sunday morning was her dad, Arnold Schwarzenegger, who has regularly been seen out in Los Angeles on bike rides with his kids on separate occasions.
Sunday’s adventure saw him opt for time with his 22-year-old bodybuilder son, Joseph Baena, and Arnold’s girlfriend, Heather Milligan.
Arnold rocked a blue colored T-shirt and a matching pair of shorts.
He accessorised with a cowboy style cap and a some slide on shoes.
Bonding: Sunday’s adventure saw him opt for time with his 22-year-old bodybuilder son, Joseph Baena
Family time: Arnold was also joined by his girlfriend, Heather Milligan, for the outing
Joseph opted for a maroon colored shirt that read 1965 on the front.
Besides Katherine and Joseph, he is also the father to Christina, 28, Patrick, 26 and Christopher, 22.
The actor and athlete welcomed Katherine, Christina, Patrick and Christopher with his ex wife, Maria Shriver, who he married in 1986 and split from in 2011.
Their 25-year marriage ended after it was revealed he had fathered a child, Joseph, with his housekeeper, Mildred, while married to Maria.
Loading up: The trio were later seen loading their bikes back onto the car
Family: The movie star is the father to, Katherine, 30, Christina, 28, Patrick, 26, Christopher, 22 with Maria Shriver and Joseph, 22 (not pictured) with his former house cleaner
Maria and Arnold’s youngest son, Christopher, was born on September 27, 1997, while Joseph was born merely five days later on October 2, 1997.
The actor wrote in his memoir, Total Recall: My Unbelievably True Life Story, that the journalist had previously asked him if he was the father to Joseph but he had denied it.
While Arnold didn’t have any confirmation he was the father for the first few years, as Joseph grew up, ‘the resemblance was so strong that I realized there was little doubt that he was my son,’ he wrote.
And while Maria and his four kids have remained close, they don’t have a relationship with Joseph – regularly sharing family photos without him.
Like father like son: While the Terminator star didn’t have any confirmation he was the father for the first few years, as Joseph grew up, ‘the resemblance was so strong that I realized there was little doubt that he was my son,’ he wrote in his memoir in 2012