Williams first revealed that boygenius - the collaborative project of Phoebe Bridgers, Julien Baker and Lucy Dacus - feature on one of her Petals For Armor tracks last week.

Yesterday (8 March), Williams shared some lyrics from her upcoming boygenius collaboration "Roses/Lotus/Violet/Iris" to celebrate International Women's Day. Williams wrote, "Happy women’s day. In honor of my personal journey through femininity, with it’s endless facets; and in honor of the feminine wonder that connects literally everyone and everything, i want to share lyrics for an unreleased song called "Roses/Lotus/Violet/Iris"."

She adds, "ROSES/LOTUS/VIOLET/IRIS features Julien Baker, Lucy Dacus and Phoebe Bridgers on backing vocals. They are just three of the incredible women who i get to know and grow alongside in this life. Can’t wait to release this song and more. Happy women’s day."

"Roses/Lotus/Violet/Iris" will be the first track to feature boygenius since they released their self-titled debut EP in 2018.

Last month Williams released the first part of her debut album as an EP.

Hayley Williams' Petals for Armor album arrives 8 May via Atlantic Records, and is available to pre-order now.