What did you miss?
Right-leaning journalist Pierce appeared dishevelled, fragile and confused during his appearance on the ITV breakfast show and was subjected to subtle digs from his colleagues that he may have had a late night and consumed a lot of alcohol.
What, how, and why?
Pierce is a regular contributor to GMB, alongside Maguire, discussing the big news stories of the day and the papers' frontpage headlines.
He appeared live from the Tory party conference in Manchester on Wednesday morning with untidy hair, bleary eyes and stumbled over his words.
'That was a very brave radical speech.' @toryboypierce
'It was a racist filth speech.' @Kevin_Maguire
Suella Braverman has warned of a 'hurricane' of mass migration and attacked the 'luxury beliefs' of liberal-leaning people in her conference speech. pic.twitter.com/m0QLVPSo2z
— Good Morning Britain (@GMB) October 4, 2023
During the debate when Maguire responded to his comments, Pierce repeatedly asked him to, "Stop shouting", and appeared to be pained by the noise.
Balls signed off the interview by telling Pierce: "My advice is a raw egg and go to bed."
Drinking raw egg is commonly thought to ease the symptoms of a hangover.
What else happened on Good Morning Britain?
Viewers of Good Morning Britain had mixed reactions to the implications that Pierce was appearing live on the show under the influence of alcohol.
Many were outraged at the alleged state of the broadcaster.
One commented on social media platform X, formerly Twitter: "#gmb presenters chuckling about Andrew Pierce being pissed up on a breakfast TV show. Remarkable editorial standards. Are their advertisers OK with this?"
Another questioned: "Should Andrew Pierce be live on the TV when he’s clearly still under the influence of alcohol? #gmb"
Another posted: "Why are you treating the state of Andrew Pierce as a joke? In any other job, if you turned up like that, you would be sacked."
And one exclaimed: "Andrew Pierce was drunk - presenters might think it was funny - it was a disgrace!"
Other GMB viewers were just bemused.
One questioned: "Has Andrew Pierce had too many late nights? The ruffled hair, the bleary eyes. . .not a great look first thing in the morning. @GMB"
Another asked: "Is Andrew Pierce steaming drunk on the papers this morning ? He was offensive and rude. Even more so than usual."
And another asked: "Andrew Pierce. Is he drunk on Good Morning Britain right now?"
Good Morning Britain airs on ITV from 6am to 9am from Monday to Friday.
Read more: Good Morning Britain
Watch: Susanna Reid questions whether Conservative MPs should work for GB News