Jenna Dewan has debuted her baby bump on social media the day after announcing she is expecting a child with her boyfriend Steve Kazee.

The couple revealed the happy news on Tuesday, saying in a statement they are "overjoyed" to be adding to their family.

Dewan has now taken to Instagram to praise her partner and speak about her excitement at welcoming her second child.

She posted a picture of herself sporting a bump as she lies beside her 6-year-old daughter Everly and wrote: ''Becoming a mother is quite simply the absolute best most incredible thing that has ever happened to me."

Dewan added of her partner Kazee: "You are a gift from above and i couldn't be more excited to be expanding our family together...! Thank you guys for all the love!!''

Meanwhile, Kazee shared a picture of Dewan cradling her baby bump and wrote in a lengthy post: "Well ... the news is out. I can't even begin to describe the feelings that I have had since we first learned that Jenna was pregnant! I have waited my entire life for this moment and couldn't have found a better person to build a family with.

"The past year and a half has brought so many things into my life that have filled me with the deepest of gratitude. A partner who radiates love, warmth, and kindness. A partner who has faced some of the hardest moments life can deal you with grace, humility, and a desire to learn from the ups and downs. A partner who is continuously growing from those lessons and who supports my growth as a person with love, unwavering support, and understanding.

"Jenna also brought with her one of the greatest gifts one could ever imagine ... her beautiful daughter. Evie burst into my life like a supernova and has continued to burn so brightly in it. I have learned so much about parenting already from watching how amazing Jenna is with her and Evie has taught me so much about what it means to love and communicate with a child and I can't wait to give her a sibling and make our little family a little bit bigger. (sic)"

This will be the first child for Kazee and the second for Dewan, who shares daughter Everly with her ex-husband Channing Tatum.

Dewan and Tatum announced that were separating after almost nine years of marriage in April last year.

Tatum is currently dating the British singer Jessie J.

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