Actress Mila Kunis poses backstage with her Best Villian award as Theodora, Wicked Witch of the West, in the film "Oz the Great and Powerful" during the 2014 MTV Movie Awards in Los Angeles, California April 13, 2014.
Actress Mila Kunis poses backstage with her Best Villian award as Theodora, Wicked Witch of the West, in the film "Oz the Great and Powerful" during the 2014 MTV Movie Awards in Los Angeles, California April 13, 2014. Reuters/Danny Moloshok

In her first TV interview since the birth of her baby, Hollywood actress Mila Kunis revealed the secret of her post-baby weight loss. The "Black Swan" actress showed off her curves and well-toned figure just two months after the birth of her first child, Wyatt Isabelle.

On the Dec. 10 episode of "The Late Late Show," host Craig Ferguson welcomed Mila Kunis, 31. The actress wore a sleeveless cutout black dress and flaunted her svelte figure. She disclosed that the secret to her slim figure, which she attained in just nine weeks after giving birth, is nursing and breastfeeding the child.

"Breastfeeding is a great workout," Mila Kunis said, as quoted by E Online. However, she also admitted to eating a lot. "I seem to eat a lot, so that kind of keeps me going through the day," the actress said.

Mila Kunis welcomed her baby with the "No Strings Attached" actor Ashton Kutcher in early October. The two made the big announcement on Ashton Kutcher's website Aplus.com, as noted by ABC News. The two have known each other from the sets of "That 70s Show"; however, they only started dating in April 2012. In early 2014, the two announced their engagement. Prior to dating Ashton Kutcher, the actress was with actor Macaulay Culkin for almost 8 years.

In the candid interview with Craig Ferguson, Mila Kunis opened up about motherhood. She even revealed how she's going to deal with Wyatt when she hits her teenage years. "That's not my problem. That's daddy's problem!" the actress joked.

Mila Kunis has been a stay-at-home mother. She talked about how she enjoyed taking time off after spending her "20s travelling." She says that it has been a luxury and a blessing to be at home with her child.

At the moment, the actress is busy promoting her upcoming movie "Jupiter Ascending," a space opera. Besides Mila Kunis, the movie stars Channing Tatum, Sean Bean and more. It is scheduled to hit the theatres on Feb. 6, 2015.