United Kingdom, Jan. 25 -- Milo Ventimiglia's wife is pregnant.

The This Is Us actor's spouse Jarah Mariano showed off her growing baby bump in a post on Instagram to mark their daughter Ke'ala Coral's first birthday.

In the post, a photo of the 42-year-old model showed her holding her little girl above her head, with her changing figure clear to see in a brown bikini.

She wrote: "Happy 1 year baby girl.

"When you came into my life I had 2 distinct thoughts, one immediately after the other - I would die for you in a heartbeat, but now I also have to live as long as I possibly can to be around to make sure you're safe.

"This is the most unique love I've ever experienced, just as unique of a soul you are. In a world with so much fear a...