(Photo credit: Glamour)

By all accounts, Jenna Dewan-Tatum has a pretty enviable life: With a major role in the new TV series "Witches of East End," her career is hotter than ever-and so is her husband, "Magic Mike" star Channing Tatum. But perhaps the most exciting component of the actress's life is that she and Tatum, 32, her husband since 2009, are expecting their first child this summer.

"I think, 'How in the world am I going to do all this?' I have no idea what I'm up against," Dewan-Tatum, 32, tells Glamour magazine in its new issue. "But I'm as mentally prepared as I can be. It's an adventure!"

In the magazine spread, on stands April 9, Dewan-Tatum playfully shows off her growing baby bump in a variety of revealing ensembles-and explains that while she was originally nervous about her new curves, her husband has helped her embrace them.

"Channing has been great," she says. "He takes the route of no confrontation, just support, saying things like, 'Do whatever you want! What do you want to eat? I'm going to leave it up to you.'"

It's that type of rapport that has made their relationship so successful, the actress continues.

"Most actors and actresses are consumed by careers and getting ahead," she says. "Channing and I are ambitious, but our relationship comes first. We take everything day by day, saying, 'Okay, how can we make this work together?'"