Jeremy Corbett takes up Naz Khanjani's painful beauty challenge live on The Project NZ

After Monday's dramatic hair and beard colour change, Jeremy Corbett has undergone another radical transformation in the name of beauty.

For the second night of The Project's Beauty Week, the host and comedian was challenged by Bachelor NZ and Dancing With The Stars NZ contestant Naz Khanjani to undergo a painful procedure.

After being told by Naz that his current eyebrows were "weak, weak, weak", Corbett's bushy brows were threaded live at the desk by beautician Ronita Sharma.

Through gritted teeth he told the audience that yes, it hurt. He was then taken backstage where he underwent a complete eyebrow makeover.

He returned to the desk a new man, with shaped brows and very watery eyes.

While he was told he looked like Jon Hamm on Monday, Tuesday's show saw Corbett compared to another Hollywood heartthrob - this time, Alec Baldwin.

Watch the video for the full The Project segment.