AceShowbiz -

Gavin Rossdale adds fuel to rumors he's dating German model Sophia Thomalla, who is 24 years his junior. Following their wild night out in London back in March, the pair were spotted enjoying dinner at Indianapolis' Iozzo's Garden of Italy on May 11.

Without providing any picture and further detail from the outing, an eyewitness told Us Weekly that Gavin and Sophia "shared a romantic meal." Though the pair have been spotted spending some quality time lately, a rep for the Bush frontman reveals that the British musician and the blonde model are not an item as they are just friends.

While Gavin seems to enjoy his relationship with Sophia, his ex-wife, Gwen Stefani, is reportedly not happy seeing him settling down again, especially with the 27-year-old model. "She's known how serious Gavin's been about Sophia for some time, but instead of being happy for him she just rolls her eyes," an insider previously said.

Sophia is said to be a really sweet person who's had a "great effect on Gavin." The 51-year-old musician is reportedly "taken by Sophia," though they only knew each other recently. "They met on the touring scene and there's plenty of chemistry," a source told The Sun. "They're having fun and the relationship has the potential to turn serious if that continues."