The baby boy who was “kidnapped” by David Bowie in 1986 cult classic Labyrinth proceeded to urinate all over the film star and musician, his father has revealed.

The film sees teenager Sarah (Jennifer Connelly) embark on a quest to rescue her infant brother Toby, who has been kidnapped by Bowie’s character Jareth the Goblin King.

David Bowie starred as Jareth the Gobin King in Labyrinth (Sony)

Labyrinth became a family affair when conceptual designer Brian Froud and his wife, creative workshop artist Wendy, put forward their own one-year-old son Toby to play the little boy in the stripy baby-grow.

However, there was a costume malfunction.

“Unfortunately, I had designed these rather slimline nappies because big nappies would have got in the way of the look, but they were useless,” Brian told the Press Association.

“So the first thing that Toby did when he met David Bowie in the first shot was pee all over him. David took it all in good part.”

There was also a plan in place in case Bowie dropped Toby.

Brian explained: “My wife Wendy was actually strangely enough on her knees out of shot, just at crotch-level of David, in case he dropped the baby, ready to catch him.”

David Bowie (Yui Mok/PA)

The late musician and actor was fantastically bizarre on set, Brian said.

“It was the first time I met him, we were in his dressing room and it was about three or four days before we started the film, and we had made him a little bone flute as a gift,” he recalled.

“He just took it and he just leapt up on to the dressing table, hunkered down and played a wonderful little spooky tune on the flute. He was very Pan-like. It was rather scary but so magical.”

A sketch for Labyrinth by Brian Froud (Sony)

To mark Labyrinth’s 30th anniversary, fantasy illustrator Brian has released early sketches of the magical creatures he created for the movie.

He has also called for the movie to be made into a musical like Bowie’s production Lazarus, saying: “Maybe oddly enough the future of all this is on the stage.”

Sketches for Labyrinth (Sony)

All the goblins and creatures were created using puppets in the age before CGI and motion capture, meaning it could translate easily into theatre, he explained.

“I just feel it’s an absolute gift to do it on stage,” Brian said. “People would come and sing the songs, and dress up I think. People would love to dress up.”

Sketches for Labyrinth (Sony)

Fans have also been urged to dress up as characters from Jareth’s masquerade ball for a special screening of Labyrinth at Empire Live.

Brian and his wife will be answering questions about the making of the film and its legacy at the event in London.

American Airlines Presents Empire Live is at The O2 in London from September 23-25. The screening takes place on Sunday at 2.30pm.