Actress Olivia Wilde is totally comfortable in her new role as mom.

In an interview with Glamour Magazine for its September issue, the "Rush" actress is photographed breastfeeding her naked three-month-old baby boy, Otis. The first-time mother, who posed in a diner booth while wearing a Roberto Cavalli dress, Prada heels, and Prada scarf, called the controversial picture "so perfect" and said her new identity revolves around being a mother.

"Being shot with Otis is so perfect because any portrait of me right now isn't complete without my identity as a mother being a part of that," she told Glamour. "Breastfeeding is the most natural thing. I don't know, now it feels like Otis should always be on my breast. It felt like we were capturing that multifaceted woman we've been discussing - that we know we can be. You can be someone who is at once maternal and professional and sexy and self-possessed. "

Despite looking glamorous during her photo-shoot, the 30-year-old actress admitted that she isn't dolled up while breast feeding, saying, "I certainly don't really look like that when I'm [typically] breast-feeding. There's usually a diaper involved."

Wilde and fiancé actor and comedian Jason Sudeikis welcomed Otis on April 20. The actress told Glamour that she and Sudeikis have no plans to get married but "are fully committed" to one another.

"We just have to find the time to put [a wedding] together," Wilde told the publication. "In many ways, a child is more of a commitment. We are fully committed and really happy as a family. And there's no definition of the 'normal family' anymore. Kids today are growing up with so many different definitions of family. I guess what I'm saying is that I don't feel any pressure to do it. But I think it will be really fun."

The former "House" actress is currently working on an HBO project with Martin Scorcese, and said as a working mother, she has developed a confidence towards her career in the entertainment industry.

"The biggest thing I did to change my career was to act on the confidence that I had built and to say, 'No, I don't need to work to stay relevant," she explained. "I'm just going to work on the things that are interesting.' I developed the confidence to speak up in meetings with Martin Scorsese, fighting for a character that I believe in."

Wilde added: "My mom is such a badass working mother. That inspired me when I was pregnant. I wasn't going to sacrifice myself because I was becoming a mother."