The chart-topping boy band - which features Marvin, Aston Merrygold, Oritse Williams and JB Gill - announced earlier this week they are reforming for a reunion tour, seven years after they split in 2013, and Marvin is thrilled that his long-held ambition has finally come to fruition.
Appearing on 'Capital Breakfast with Roman Kemp', Marvin confessed: "It's lovely to be back here with my brothers. It's something I've been waiting for for a long time.
"Four years ago I tried to make this happen. I was on the phone to the guys like, 'Come on guys, let's just get back together, we should have never broke up. You're telling me that our heart won't beat again?'
"I remember taking Oritse for a dodgy little sushi around the corner from here and I was like, 'Rish, come on bruv, let's make this happen.'"
But Ortise wasn't ready to return to the band at the time, admitting he broke Marvin's heart with his decision.
Marvin added: "He was like, 'Nope, we're not doing it!'"
The award-winning boy band - who formed in 2007 - are due to embark on their 'Beat Again' tour of the UK and Ireland in November, starting at the 3Arena in Dublin and finishing at the Motorpoint Arena in Nottingham on December 2.
Tickets for the tour go on general sale on Friday, February 21 below.
Tune into 'Capital Breakfast with Roman Kemp', weekdays from 6am till 10am.
JLS' 'Beat Again 2020' tour dates:
12 - Dublin - 3Arena
13 - Belfast - SSE Arena
15 - Brighton - Centre
16 - Bournemouth - International Centre
18 - Cardiff - Motorpoint Arena
19 - Hull - Bonus Arena
20 - Sheffield - Flydsa Arena
21 - Newcastle - Utilita Arena
25 - Leeds - First Direct Arena
26 - Glasgow - SSE Hydro
27 - Manchester - Arena
28 - Birmingham - Resorts World Arena
30 - Liverpool - M&S Bank Arena
01 - London - The O2 Arena
02 - Nottingham - Motorpoint Arena