According to The Sun's Simon Boyle, Fergie is set to play an integral role in the nuptials of British singer Ellie Goulding after being invited to the star's hen party this May.
The Your Song hitmaker reportedly met the Duchess of York through her daughters, Princesses Beatrice and Eugenie, and hit if off instantly thanks to Fergie's larger than life persona.
Ellie and the royal granddaughters of Queen Elizabeth have been friends for many years, and are regularly pictured together at exclusive gatherings and charity events.
WATCH: Ellie Goulding Talks Wedding Guest List and DJ!
According to The Sun, Eugenie introduced the songwriter to her art dealer fiancé Caspar Jopling.
For her part, Ellie performed at Eugenie's October 2018 wedding to Jack Brooksbank.
The two couples were photographed sitting court side watching a basketball game at Madison Square Garden in October 2017.
No stranger to royalty, Ellie was once rumoured to be dating Beatrice and Eugenie's cousin Prince Harry.
The two were pictured together in fits of laughter at the 2014 Glastonbury Festival.