The 51-year-old, who had a bone marrow transplant to treat a rare blood disorder on September 20, arrived at the studio at 5am for an off-camera test run to determine if she is physically ready to start work again.
Thumbs up: Robin Roberts returned to the set of Good Morning America on Thursday for an off-camera test run
Welcome back: Lara Spencer handed Robin hand sanitizer as she settled back in on the set
Easing back in: Robin was delighted to be back at her workplace
Recovering: The TV host in October
'I can't wait to get back to the anchor chair in a few weeks.'
The host, who lost her hair as a result of treatment, was photographed flashing a big smile while giving the thumbs up.
Last week, Roberts explained that her doctor had approved a series of 'dry runs' to see how her body copes.
'My doctors want me to see how many people I actually come in contact with,' Roberts said.
'How my body reacts to the stimulation, that's code word for stress, of being in the studio environment.'
She added: 'My skin is very sensitive and so we have to see how it reacts to the studio lights. My vision is still a little blurry from the treatment. All of this is getting better day by day so that is the next step.'
Roberts was diagnosed with MDS - or myelodysplastic syndrome - last year.
Brave battle: Robin shared her journey with her fans on Twitter
Robin has openly shared her battle with the disease with viewers through tweets, phone calls and live-cross interviews on GMA over the last few months.
She recently thanked her fans for their support, saying: 'GMA viewers - your messages, prayers and well wishes have given me an enormous amount of strength and hope.'
On the couch: The star with the Good Morning America team last year