The 'Big Brother's Bit On The Side' host was appearing as a guest on the ITV daytime show shortly after his stint on 'The X Factor', and was left horrified when collagen began dribbling down his face.
Writing in his new autobiography, 'The Life Of Rylan', he recalled: "I was really nervous about going on 'This Morning', but Phil [Schofield] and Holly [Willoughby] were brilliant and all I remember is that we just laughed and laughed.
"The worst thing happened though. I laughed and laughed SO much my lip burst open and collagen filler started to dribble out.
"I'd had a bit too much filler put in the week before. The fucking horror. Live on TV and half my lip was spread across the floor..."
He continued: "SOMEHOW it wasn't as awful as it could have been and we continued to laugh at the situation. I joked and said I'd hit my lip on a wall before quickly telling the truth.
"I remember going into a cosmetic-counter mode and piping up like I was Jackie Stallone: 'I have my lips filled, although mind, you might go off when going through an airport'.
"Someone shut me the fuck up I managed to get through both interviews relatively unscathed," he added.
Rylan has since become a regular on 'This Morning', hosting his own showbiz segment, and occasionally standing in for Eamonn Holmes.
He and his husband Dan will even make 'This Morning' history next month, when they become the first gay couple to host the show, stepping in for Eamonn and wife Ruth Langsford on Friday 8 July.
Tap the image below to launch the slideshow...
Also on HuffPost
Suggested For You
Get top stories and blog posts emailed to me each day. Newsletters may offer personalized content or advertisements. Learn more