By Ryan Prosser
Published: 17:16 EDT, 30 September 2023 | Updated: 17:16 EDT, 30 September 2023
It comes just days after Bonneville, 59, attended a star-studded, without his wedding ring or his partner, 55.
A spokesperson for Bonneville confirmed that the couple had separated after living together for 25 years at their home in West Sussex.
Bonneville and Lulu were last seen together at the Old Vic Theatre in London for a gala in April.
The couple met while they were teenagers. After a period out of touch, they got married in their 30s in November 1998.
Bonneville still wore his gold wedding ring while attending the Coronation Concert in May