Lillie made her EOTB debut on Tuesday night, emerging from the sea in Thailand to face her ex-boyfriend Gaz, who she split with in October 2015 after more than a year of dating.
And watching the scenes back, Gaz found himself with a lump in his throat...
Writing in his column with the Daily Star Online, Gaz said: "I guess you saw Ex On The Beach last night. F*** me, that was emotional.
"It was hard seeing Lillie come on the beach but this definitely isn't the end of the story. There's lots more to come on the show."
During the MTV show, viewers saw Lillie insisting that Gaz "owed her an explanation" for the way he treated her. She later told the girls: "I've never, ever loved anybody in my entire life like I loved him. That's the person I wanted to marry. I never had feelings like that before. I worshipped him."
Gaz, meanwhile, admitted: "She's the nicest person you'll ever meet. I haven't seen her in person since the day we finished. Her sitting next to me doesn't feel real."
Fans will already know that Lillie later went on to date EOTB's Stephen Bear, before their romance came to a sticky end during his Celebrity Big Brother stint.
Although she is no longer speaking to him, Lillie is back on good terms with Gaz, but it is purely platonic.
In his column, Gaz also confirmed their friendship after he was recently spotted out with her. He added: "Like I said on Twitter this week, a couple of grainy shots taken on a phone in a club show nothing other than us now being mates."
Ex On The Beach 504 | Shack Of Secrets: Lillie's heartbeak and Bear thinks Gaz is a muppet
Watch More: www.mtv.co.uk/ex-on-the-beach
EOTB continues, 10pm, MTV, Tuesdays.