Olivia Wilde talks relationship with Jason Sudeikis, her fears for marriage

Olivia Wilde has made no secret of how crazy she is for funnyman Jason Sudeikis. Still, in the new issue of InStyle, the hopeless romantic concedes it often takes more than love to keep a Hollywood relationship alive.

“There are spikes and dips and plateaus in this business,” cover-girl Olivia said. “I’ve seen couples fall apart through it, and it is heartbreaking.”

Unbelievable as it may be, the stunning star once said she worried she wasn’t “beautiful enough” for Jason. In the latest interview, she opened up about even more relationship fears.

“You wonder what will happen,” Olivia said. “Will he love me if I’m not as successful? Will jealousy kill us?”

Olivia, who has been engaged to the SNL star since last January, will also have personal experiences to pull from during her new relationship. The 29-year-old was previously married to Tao Ruspoli from 2003 until 2011.

“I had grown up with Tao; we had just drifted,” she told Marie Claire last year. “I felt I had something to prove. If you fall off a horse, you get back up. I am not a quitter. I hung on for as long as possible, until it was more hurtful to stay… I’m so grateful for the pain and the heartbreak. It gave me the courage to leave and brought me to the great love of my life.”

Now preparing to walk down the aisle with that “great love,” Olivia said she truly feels fulfilled.

“I like having a real partner. It’s the model I grew up with. It’s part of why I was able to take so many chances in my life, because I felt like someone was watching my back. I could never imagine life without someone I respect, someone who offers me infinite possibilities.”