Katherine Schwarzenegger grins from ear-to-ear as she heads to tennis with sister Christina in LA

She is a new mother after welcoming her first child in the summer of last year.

So no doubt Katherine Schwarzenegger is always excited to enjoy some exercise and bonding time with her nearest and dearest.

The 31-year-old author had a huge smile on her face as she headed to play tennis in Los Angeles with younger sister Christina, 29, in Los Angeles on Monday morning.

Katherine had racket in hand as she grinned from ear-to-ear before hitting the courts with her sibling.

She kept it comfortable in a black hoodie with matching leggings and white Adidas tennis shoes as her sister nearly wore the exact same thing.

Her brunette tresses were pulled back in a messy ponytail as she showed off her natural looks by going make-up free. 

Katherine is married to action star Chris Pratt who flew back from filming his new movie Thor: Love And Thunder in Australia to celebrate Valentine’s Day with her last month.

Pratt has been filming the latest installment of the Marvel film in Byron Bay for the past month, but knew the importance of returning home to see his lady love and their daughter Lyla Maria who was born in August. 

The 41-year-old actor even took to Instagram to share a tribute to his wife as he shared an image of her on the beach with their daughter in the baby carrier and a heart drawn in the sand in front of them.

He captioned the snap to his 30million followers: ‘To my love @katherineschwarzenegger I’m a lucky man. 

‘You’re a wonderful wife, mother, step mother and Valentine. Thanks for EVERYTHING you’ve given us. I love you so much. [heart emoji] #happyvalentinesday’

She also paid tribute to him on Instagram, naturally referring to him as her ‘valentine,’ while sharing a loved-up selfie. 

The Guardians Of The Galaxy star Chris and Katherine first wed in June 2019 and brought Lyla into the world in August. 

The pair credits their faith and family values in giving them a foundation for a lasting relationship as the couple swiftly got engaged after six months of dating. 

Recently, Katherine’s famous father dad Arnold Schwarzenegger publicly gave his approval on his son-in-law and said that he ‘never, ever thought’ she would ‘marry an actor’.

He gushed: ‘Chris is a fantastic guy and so easy to get along with and so I’m really happy because he has been such a really wonderful, wonderful husband to her and such a great son-in-law.’