What a woman! Olivia Wilde went bold for the September issue of Glamour magazine, posing for high-fashion photos while breastfeeding her newborn son Otis.

The actress, 30, sits in a classic diner booth in a chic metallic Roberto Cavalli feathered dress and towering Prada shoes with a magenta Prada scarf, Yossi Harari earrings, and an eye-catching Lanvin ring, but the focus is on something else entirely. With her right breast exposed, Wilde holds her naked baby Otis in her arms as he nurses.

“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,” Wilde said of her son, 3 months, whom she and fiancé Jason Sudeikis welcomed on April 20. “Breastfeeding is the most natural thing.”

“I don’t know, now it feels like Otis should always be on my breast,” she continued. “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. [But] I mean, I certainly don’t really look like that when I’m [typically] breastfeeding. And there’s usually a diaper involved.”

Her nursing practices weren’t the only thing that Wilde was candid about in the latest issue of Glamour, which featured the star on the cover in a Lanvin dress and scarf. The actress also opened up on on everything from her first marriage to Tao Ruspoli to her wedding plans with Sudeikis to how she feels about being a working mother.

“We’re engaged, but no specific plans yet,” Wilde divulged about when she and Sudeikis, 38, will exchange vows. “We just have to find the time to put it together. 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.”

When she weds her actor love, it won’t be the first time that Wilde has said “I do.” In June 2003, the Her star married Italian aristocrat Ruspoli when she was just 19 years old. They announced their separation in February 2011, and their divorce was finalized in September 2011.

“[I] wouldn’t be this person without that first marriage,” Wilde told Glamour. “I really grew up with my first husband. Now I’m in a much wiser, more centered place in life. I think if we can see people in our lives as chapters, we have a much healthier perspective about the whole thing. It’s like it had to happen the way it happened. Jason and I lived two blocks away from each other for years and never met.”

Luckily for the House alum, she did meet Sudeikis finally, and the pair got engaged in January 2013. Now that she is also the mother to his son, while continuing her acting career, Wilde takes the title of a working mother—one the star says she was not nervous about adopting.

“Because of the example of my mom,” Wilde explained of mother Leslie Cockburn, a television producer, writer, and filmmaker. “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.”

For more from Wilde, pick up the September issue of Glamour, on newsstands on Aug. 12.