Scarlett Johansson Believes Breastfeeding Is the "Best Way to Get Back in Shape" After Having a Baby

Actress calls motherhood "wonderful," "very, very magical" and "exhausting"

Breastfeeding is mutually beneficial—just ask Scarlett Johansson!

The actress recently taped Barbara Walters' annual 10 Most Fascinating People of 2014 special. It was Johansson's first TV interview since giving birth to daughter Rose Dauriac on Sept. 4, and in it, she shared how she shed her post-pregnancy pounds. "[Breastfeeding is] the best way to get back in shape," the 30-year-old Avengers: Age of Ultron star explained. "[I do] the whole bit. I'm nursing and I love it."

Scarlett, who secretly married Romain Dauriac one month after Rose's birth, described motherhood as "wonderful," "very, very magical" and "exhausting." So, is her bond with her little girl everything she imagined it would be? "The love is just unbelievable," the Lucy actress said. "It's very overwhelming."

No word yet if Scarlett also talked about her wedding—but if she did, the conversation will undoubtedly appear in the annual special. The 10 Most Fascinating People of 2014 airs Sunday at 9 p.m. ET on ABC.

This wasn't the first time Johansson has talked about life after baby, however.

The Dolce & Gabbana spokeswoman recently did an interview with Germany's Gala magazine, and just last week, Johansson told Style.com that her workout routine hasn't become "crazy-different" since welcoming a daughter. "It's just about trying to find time to go to the gym," the Nanny Diaries actress explained. "I do the same fitness routine as my big muscle-man trainer. A lot of it is endurance, stability, and strength training. I like to work up a sweat. I've tried Pilates and yoga and all that, and I like to dabble in different things, but I always come back to a good old-fashioned athletic, full-body workout."

Johansson likes to exercise, but even she gets fitness fatigue. "Of course, like anyone, I have days when I don't want to go," she admitted. "Those are the days when you should go because then you stick to it."

"Once I get into a routine of going to the gym every day when I'm working, it's easy for me to just keep going. It makes me feel good," the actress continued. "But once I start to slack, it's so hard to go back."