The couple have been married for two years but were first spotted together back in 2018.
It has been just over a year since they announced the birth of their first child.
The magazine posted to Instagram, writing:
“Baby on the way! ? Chris Pratt and Katherine Schwarzenegger are expecting their second child together, PEOPLE can exclusively confirm”.
View this post on Instagram
This will be Chris Pratts third child as he had on with his previous wife Anna Faris, of eight years.