"It is great to have you full-time," Roberts told Strahan after a round of applause on set.
The show also tweeted, "So great having @MichaelStrahan on @GMA full time!"
"It's a great day, though. ... It's bittersweet," Strahan said on his last day. "Of course, you get nervous like this. I've done this for four years. So, this is a moment that I didn't anticipate being here, at least at this point, but it's here and we're going to enjoy it. I'm not dying. I'm still in the family. And I'm still available to come back if I'm ever called to co-host. So, I'm not going anywhere. I'm not gone, so here we are."