Hasselbeck, who will become a co-host on "Fox & Friends," received a standing ovation as she walked out on Barbara Walters' arm.
Though her departure apparently came as something of a surprise to the show, which is now down one co-host and will soon see two more leave, everyone was all smiles and tears on air.
"I am a little emotional," Walters said, adding, "You know I always want what's best for you. You know how I feel about you."
Hasselbeck had kind words for all of her co-hosts, and her co-hosts had kind words for her. Walters warned that the show would not be filling Hasselbeck's slot "very soon."