Lily Allen to expose details of raunchy mid-air romp with married Liam Gallagher

Lily Allen is set to expose an on air romp with Liam Gallagher in her new book [Getty]

Lily Allen is reportedly poised to reveal details of a mid-air romp she once had with rocker, Liam Gallagher. 

The Smile singer reportedly enjoyed a boozy bender with the former Oasis performer while on the plane to a festival in Japan together. 

And now she is set to reveal all the details in her “dynamite” new book, which will be released next year. 

Liam Gallagher and Lily …