Luke Trotman will propose to Siannise Fudge "very soon".
Luke Mabbott, Luke T's good pal and fellow former Islander, believes the couple - who met on the ITV2 dating show earlier this year - could shortly tie the knot.
It comes after fans of the show questioned whether the pair were still together after she posted a video dancing on social media - with Luke T noticeably absent.
But Luke M has assured supporters the couple are still very much an item.
During a Q&A session on YouTube, one fan asked the 24-year-old star if he thought Luke T would propose to Siannise soon, and he replied: "Er yeah. He's soppy, he is head over heels, so yeah he'll propose soon. He was dropping L bombs all over the frickin' place."
Luke M then joked he has no problem with the pair making things official - just as long as he has somewhere to stay in the couple's marital home.
He said: "As long as he keeps a bed in the house for me then it's all sweet."
Speculation that the pair may not be an item came after Siannise uploaded a dance video and captioned it 'Don't Need Love', and Luke T was nowhere to be seen.
However, the caption simply referred to a song from the singer Gracey.
One fan asked: "Siannise where's Luke lol you two are adorable x (sic)".
Another said: "Wait, are her and Luke still together? (sic)"
Siannise - a 25-year-old beauty consultant - and semi-pro footballer Luke T have also opened up about spending almost all of their time together since leaving the show's villa.
He told OK! magazine: "The longest we've been apart is about an hour!"
Speaking to Siannise, he said: "I think you got your nails done, didn't you? And I got a haircut."
She confirmed they'd been virtually inseparable since returning to the UK.
The star said: "But that's the only time we've been away from each other and it's literally been an hour. But do you know what? We wouldn't have it any other way. I couldn't imagine it now, not being with you. If I turned round and Luke wasn't there, I think I'd panic! "