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'The Bachelor's' Nick and Vanessa pose with Peta Murgatroyd and her baby, Shai

by Shane Lou / / Source: TODAY

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Nick Viall’s reality TV work is never done. Though his season of “The Bachelor” ended Monday night, he’s in training for his next gig: contestant on “Dancing with the Stars.”

Fortunately, he has the support of his new fiancée, Vanessa Grimaldi, who dropped by rehearsal Wednesday as he practiced his moves with his pro partner, Peta Murgatroyd. Grimaldi may have been overshadowed by another, smaller, more adorable visitor: Murgatroyd's 2-month-old son, Shai!

Don’t let Viall's facial expression concern you. That look has nothing to do with the fact that he’s holding an infant. It’s more a reflection of the anxiety he feels heading into next week’s season premiere of “Dancing with the Stars.”

“TEAM BABY GOT BACH ... is ready for Monday night !! Well these 3 are … I'm terrified!” he wrote. “I think we make a pretty great team.”

RELATED: 'The Bachelor' finale recap: Nick Viall chooses Vanessa Grimaldi

Murgatroyd posted the same photo and worked in their team’s fantastic nickname in the caption, too. “FINALLY!!! We can all be together,” the new mom wrote. “Team Baby Got Bach is here guys and we CANT WAIT to perform for you on Monday.”

Well, we know who Sir Mix-a-Lot will be voting for this season!

Grimaldi, whom Viall chose over Raven Gates on the “Bachelor” season finale, gave us another behind-the-scenes glimpse of Nick, Peta and Shai at rehearsal.

Murgatroyd's fiancé and Shai’s dad, Maksim Chmerkovskiy, will compete on the new season of “Dancing with the Stars,” too. He’s partnered with former “Glee” actress Heather Morris. Hopefully we’ll get a photo of Shai with the two of them in the near future!

Follow Shane Lou on Twitter.

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