Oprah Guest Hosts 'Good Morning America,' Receives a Call From Robin Roberts (Video)

Oprah Winfrey filled in for Good Morning America anchor Robin Roberts on Thursday, fulfilling a "lifelong dream" -- years after falling short in her quest to substitute for then-anchor Joan London.

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“I can’t wait to get out there and sit at the desk,” she said from backstage.   

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Plenty of hilarity ensued during the course of the show, starting with anchors George Stephanopoulos and Lara Spencer picking Oprah up to bring her to the show. Spencer was still in her pajamas and Oprah had curlers in her hair as they picked through the garbage in the back of Stephanopoulos’ car to make room.

Oprah even had her first photobomb experience -- as if she could ever go unnoticed -- as she snuck behind an audience member backstage. “I loved it so much I just want to go around New York all day and photobomb,” Oprah said.    

Joy Behar and Sam Champion also provide plenty of entertainment during the “Twitterpiece Theater” where they acted out some tweets from Oprah’s fans, helping her achieve another dream to be on Broadway. Technically, at least.

The show was not without its emotional moments, however. Roberts, who has been home recovering from a bone marrow transplant for the last month, called into GMA for the first time. She discussed her recovery and how sometimes she feels like she’s “35 days old and can’t get [her] head off the pillow.”

She ensured her co-anchors and the audience that she is feeling better, though. “I can’t wait to come back. I want to be back on that couch,” she said. “You have lifted my spirits. You’ve got me on my feet. You’ve got me dancing.”