Chris Pratt feels "grateful" to have married Katherine Schwarzenegger

He wrote on Instagram: "Happy Birthday, Katherine! Thank you for all of the joy you've brought all of us through the years. To see the way you care for our family. To see the way you run the house. To see the way you communicate. Your wisdom and mindfulness are a blessing I thank God for every day. I'm so grateful to have married you.

"We all feel so well taken care of and loved. Through the ups and downs, I got you Chief. Love you."

The 'Guardians of the Galaxy' star - who also has 12-year-old son Jack from his previous marriage to Anna Faris - and his wife announced the arrival of their third child last month in a post on social media.

In a joint post on Instagram, Katherine and Chris said: "We are overjoyed to announce the birth of our son, Ford Fitzgerald Schwarzenegger Pratt. Mama and baby are doing well and Ford's siblings are thrilled by his arrival. We feel so blessed and grateful.

"Love, Katherine and Chris (sic)"

The social media post also confirmed that Katherine gave birth to her son on November 8.

Meanwhile, Chris previously opened up about his parenting style, revealing that he wants his children to "feel comfortable expressing themselves".

The Hollywood star told E! News: "I think there's a new age of parenting.

"I grew up, I did exactly what my parents said all the time. I never knew I could say 'no' to my parents. And now I'm a guy who's not super ... didn't have a super healthy grip on his own emotions. So we're trying to raise them in a way that they feel comfortable expressing themselves.

"They still know the meaning of the word 'no' from their mom. When it comes from me, they don't seem to know what that means. And I don't really know what to do about it, but we'll get there."