Robin Roberts To Oprah: 'I Can't Wait To Come Back' To 'GMA' (VIDEO)

Robin Roberts called into "Good Morning America" for the first time since her bone marrow transplant over a month ago -- and she spoke to none other than guest host Oprah.

The talk show queen was one of the many big names filling in for Roberts while she recovers from her operation. She co-hosted the second hour of "GMA," taping a bit with her hair in rollers and hawking some of her favorite -- well, most-liked, at the very least -- things. ("Miracle Body Jeeeaaaaaaaaaans!") She also played "Twitterpiece Theatre," reading out some of her tweets with the help of Joy Behar.

But the centerpiece of the hour was Roberts' call.

"You have lifted my spirits," she told Oprah.

"How are you?" Oprah asked.

"It's day 35 ... and it is a journey, my friend. I am so incredibly blessed to be doing as well as I am. Sometimes I feel incredibly old, and I can't get my head off the pillow, but those days are becoming fewer and fewer."

"I can't wait to come back!" she added.

"I felt your presence when I walked into the studio," Oprah replied.

See how Oprah came onto the show in the video below: