St Kilda’s rising ruck star Rowan Marshall might be doing everything right on the field, but he’s got a thing or two to learn about live TV.

Appearing on The Sunday Footy Show this morning, Marshall had the panel scrambling to move on after dropping both an f-bomb and an s-bomb in his live appearance.

WATCH THE BLOOPER IN THE VIDEO PLAYER ABOVE

It seemed to start off OK, but his answer to a question the Saints’ impressive win over Melbourne quickly got derailed.

“I was a bit nervous at the start,” he said.

“Previously we would have just gone away from.... oh sh*t, I’ve f**ked it.”

Host Tony Jones and the panel acted as quickly as they could to change the subject.

Live TV can be a dangerous beast.

It was one of the few blights on a season which has seen Marshall emerge as one of the game’s most promising young ruckmen.

The 23-year-old has played a career-high 15 games this season, averaging 17.4 touches and almost 30 hit-outs per game.

His form has earned him a three-year contract extension, keeping him at the Saints through to the end of 2022.