Christian Bale and his wife Sibi are expecting their second child, Us Weekly can confirm Credit: Steve Granitz/WireImage

Back to diaper duty! Christian Bale and his wife Sibi are expecting their second child, Us Weekly can confirm. (E! was first to break the story.)

"They are truly a supportive couple, he and Sibi are thrilled," an insider tells Us. "She's been traveling with him while he's been touring around for American Hustle."

Indeed, Bale, 40, and his wife recently stepped out together to support Bale's film at the 86th Academy Awards on Sunday, March 2. The Best Actor nominee walked the red carpet with the expectant mother, who attempted to hide her baby bump in a gorgeous black gown.

The actor and his wife tied the knot in January 2000. They are already parents to an 8-year-old daughter, whom they welcomed in March 2005.

"The last few years of my life have been spent just watching animation -- for my daughter -- and getting a kick out of that," the Dark Knight Rises actor gushed to Esquire in 2010 about fatherhood. "I love anything that she likes. If she's getting a kick out of it, I love it. I find myself tearing up at the most ridiculous things now, sitting next to my daughter while she's watching a movie."

He continued: "Me and my wife look across at each other like, "Oh my God! Are we really doing this? Yes we are!"