The 'American Idol' host and the 'Safe Haven' actress reportedly called time on two-year-relationship recently because their '' busy work schedules proved to be a great challenge for them both'', according to People magazine.
Yet, Ryan, 38 and 24-year-old Julianne are still in contact and remain friends.
Julianne previously admitted juggling work and a relationship was tough.
She said: ''It's a hard thing to do, especially when you're so caught up in your work and bettering yourself. I think at the end of the day you have to find a balance with what's really important.''
However, just last month, Julianne hinted the couple had been discussing marriage and admitted seeing Ryan on TV at the Grammy Awards made her heart skip a beat.
She said: ''I flew in from Nashville - I was at my sister's baby shower - and I walked in right as he was on and he looked so hot. He looked so cute! I got all giddy because it was super exciting to see my man on TV. I was so proud of him.
''I always thought of who I'm going to be with the rest of my life and what my life is going to be like with that person.
''I was one of those girls when I was a kid that never really planned a wedding or thought of the big wedding day. A wedding to me is whatever, I mean, it's a cool party but I'm not a big wedding kind of person.''