Rocketman's Taron Egerton and Richard Madden 'got DRUNK' the night before ...

They will portray Elton John and his music manager, and former lover, John Reid in Dexter Fletcher's new musical Rocketman.

And co-stars Taron Egerton and Richard Madden, 32, are set to promote the film by taking part in a new edition of Carpool Karaoke in London, which will air on Friday.

Teasing the forthcoming episode of the web series, the actor, 29, appeared on The Late Late Show with James Corden on Monday, where he revealed they 'got blind drunk' the night before filming the episode.

Explaining what happened, Taron began: 'I haven’t checked with Richard if this is OK to say, but we went out the night before and got blind drunk.

'Don’t worry, I made sure I sobered up before I drove,' he reassured viewers.

Before adding: 'Yea, we went out and had a good time, allowed an appropriate amount of time for me to sober up, and then we filmed Carpool Karaoke.'

Then previewing the hilarious teaser clip, Taron got into the car with Richard in a full Elton John-inspired costume complete with feathered cap, multi-coloured feathered jacket and statement orange-tinted shades.

Struggling to get into the car, Richard carefully guided him in with a reassuring 'I've got you', before he said: 'I think you should maybe change mate.'

To which Taron said: 'Well Richard I’ve said this the whole time! I said it’s not going to work.'

Hoping to appease him, Richard went on: 'We at least gave it a try.'