The Results With Lucy owner, 24, dated Mario, 28, for two years, with the highs and lows of their relationship being documented on TOWIE, before they eventually split.
Now they've both left the show but were seen hanging out together at a celebrity party earlier this year. Mario also sparked rumours of a reconciliation in early March when he tweeted his support for Lucy's fitness business.
So, what's going on?!
Speaking to Fabulous, Lucy explained they'd both been invited to the same party so naturally they went over to say hello to each other.
"It was strange because I hadn't seen him in so long," she said, "but we actually had a really lovely, adult conversation. It felt like we'd both grown up a lot, and he seemed very mature and content. I just got that vibe from him. He seems more relaxed."
Lucy added she did get a "funny feeling" seeing Mario again, but put that down to having a past with someone and then seeing them again.
"I never thought he was a horrible person but actually, he seems like he's really changed. But oh god, I can't even imagine myself with anyone right now."
Lucy split from Olympic gymnast boyfriend Louis Smith in February. They initially met on BBC gymnastics show Tumble, but romance didn't blossom until the show had wrapped.
Mario previously dated model Emma McVey and Olympian Louise Hazel.
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