Alec Baldwin fans used to the actor's brash antics and Twitter tirades are in for a shock when they see him in the most supportive role may have ever played - doting husband and dad-to-be.

Baldwin revealed his softer side in his wife Hilaria's new yoga DVD, "Fit Mommy-to-Be Prenatal Yoga." The instructional video stars the then-pregnant Mrs. Baldwin coaching her 55-year-old husband to support her in her yoga practice.

The 29-year-old new mother opened up about the couple's balance of power in an interview with "Vanity Fair."

"He very much did what I wanted him to do," she said of the video shoot. "I was the boss that day. We're both very bossy people, and that day he let me be the boss."

ABC News

The couple welcomed a baby girl, Carmen Gabriela, in August.

First Peek: Hilaria and Alec Baldwin's Baby Nursery

Baldwin has credited his yogi wife's influence with helping him get happier and healthier.

"I think he's wildly in love with his wife," said Howard Bragman, a longtime publicist and ABC News consultant. "She has a new project and he's there to support her as any loving husband would do. I think she's been a really good, calming influence on her."

The DVD is being released this Tuesday, Oct. 1 and is available at Amazon, AcaciaLifestyle.com and select retailers.