The Bros star said he and Luke hadn’t spoken in four or five months and that a performance at Glastonbury would be something he’d love for them to do together.
The rift came up when host Susanna Reid asked Matt what was happening with Bros.
And he admitted: “Well we're not talking at the moment.”
Jokingly referring to the feud between Oasis stars Noel and Liam Gallagher, Matt joked that he and his sibling were “the Gallaghers of pop”.
He then issued a plea to his brother live on air, saying: “We're just, I don’t know, Luke, if you're watching this, we should talk at least.
“It's weird going on national TV and asking my brother but it's quite funny because the family, we're just so dysfunctional me and Luke sometimes.
“We haven't spoken for about four or five months now.”
The singer said when the pair were talking they had plans for 2024, such as new music and a possible follow up to their 2018 documentary After The Screaming Stops.
Discussing what had gone wrong, he said he didn’t really know, but went on: “My favourite person to play with on stage is my brother.”
“That would be a phenomenal way back,” he said.
Reid chimed in: "Good for you for being honest and Luke, you know I hope that you and Matt can make up and make it work.”
People watching the ITV programme were touched by the star reaching out to his twin on TV.
“Matt you are just lovely,” one posted on Twitter.
“Matt Goss just provided a brilliant example of how you publicly put an end to brotherly squabbles,” said another.
Watch: Matt Goss celebrates 10 years in Las Vegas