Actress Jenna Dewan has announced she is expecting a baby with her new boyfriend Steve Kazee.

The 38-year-old shared the news with People magazine in a statement: "We are beyond overjoyed and couldn't be happier to be expanding our family!".

It will be the second child for the Step-Up star, who has a six-year-old daughter with her ex-husband Channing Tatum.

Tatum and Dewan met on the set of 2006 movie Step Up and married in 2009.

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Jenna Dewan and Channing Tatum in the 2006 movie Step Up. Photo / Supplied
Jenna Dewan and Channing Tatum in the 2006 movie Step Up. Photo / Supplied

According to E! News, prior to the public announcement Dewan shared the news with Tatum, and a source said: "he is happy for her and very supportive."

Dewan first made her relationship with the Tony-Award winning actor Kazee public in June this year.

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Speaking of peace....❤️

A post shared by Jenna Dewan (@jennadewan) on

She began dating the 43-year-old in October 2018.

Tatum is currently in a relationship with British pop star Jessie J.