Jenna Dewan shows off her pregnant tummy as she models a funny baby skeleton ...

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She is expecting her second child with boyfriend Steve Kazee. 

And on Thursday, Step Up actress Jenna Dewan took to Instagram to show off her bump as she was dressed in a clever Halloween costume. 

The star's boyfriend, who celebrated his birthday one day prior, also took to social media to show off his pretty lady and his growing baby.  

'This is Halloween!': On Thursday, Jenna Dewan, 38, took to Instagram to show off her bump, dressed in a clever costume

'This is Halloween!': On Thursday, Jenna Dewan, 38, took to Instagram to show off her bump, dressed in a clever costume

Jenna, 38, wore a skeleton outfit, complete with a baby version in her bump area.  

'This is Halloween!' wrote the star, as she padded her belly for a Boomerang video. 

Meanwhile, boyfriend Steve shared a photo of his love, alongside a heartwarming caption. 

'Things that go “bump” in the night! My 44th Happy Halloween and Baby Kazee’s first! Thank you all for the birthday wishes yesterday.

Best. Birthday. Ever.,' he wrote. 

Best. Birthday. Ever.': Meanwhile, boyfriend Steve Kazee, 44, shared a photo of his love, alongside a heartwarming caption

Best. Birthday. Ever.': Meanwhile, boyfriend Steve Kazee, 44, shared a photo of his love, alongside a heartwarming caption

Earlier in the day, Jenna went trick-or-treating with daughter Everly, six. Joining the duo, who were dressed as angels, was Steve, who sported a Paul Bunyan look.

Jenna shared a snap of herself with her daughter, though put a heart emoji over her little one's face to keep her from social media. 

Jenna recently admitted that her her privacy attempts aren't working with her little one. 

Family outing: Earlier in the day, Jenna went trick-or-treating with daughter Everly, six. Joining the duo, who were dressed as angels, was Steve, who sported a Paul Bunyan look. Jenna said that Steve 'helps me a lot with co-parenting'

Family outing: Earlier in the day, Jenna went

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