Jenna Dewan says seeing Steve Kazee become a father is ''one of the greatest things'' she's ever witnessed.

The 'Flirty Dancing' host and her fiancé became parents to son Callum in March, and in a sweet tribute on Instagram, Jenna - who also has six-year-old daughter Everly with her ex-husband Channing Tatum - has said she feels ''so lucky'' to have Steve as part of her family.

Posting a picture of the 44-year-old actor and their son, Jenna wrote: ''Seeing you become a father is one of the greatest things I've ever witnessed. The depth of emotion you feel, the love you share, the insane ability you have to do it ALL for all of us..we are so lucky (sic)''

The adorable post comes after Jenna, 39, recently praised her beau and his ''amazing'' fatherhood skills, as she said the pair are becoming pros at tackling parenting amid the coronavirus pandemic.

She said: ''He is amazing. He really helps out so much every morning. I'm up breastfeeding three times a night, so he wakes up, he takes the baby. I get that extra hour and half, two hours to sleep in the morning ... he's just stepped into 'new dad' beautifully, like it's shocking me.''

Meanwhile, Steve took to Instagram himself earlier this week to praise his son as ''the brightest light in this darkest hour''.

He wrote: ''My beautiful boy. I hope you see this someday and know that your daddy loves you better than anything in this world and that, to him, you are the brightest light in this darkest hour. You give me hope. You give me love. You give me everything. I will never stop trying to give you all that and more in return. I love you son! Happy 2 months Callum! (sic)''