The 23-year-old daughter of Courtney Love and the late Kurt Cobain reportedly tied the knot with her partner of five years Isaiah Silva, with her mother only finding out after the pair had said 'I do'.
A source said: "Frances is totally loved up with Isaiah, but she's never been one to broadcast it to the world. She only invited a close circle of friends to the party, and then phoned her mum afterwards to tell her the good news."
And the 'Paradise City' hit maker is said to be "sad" she wasn't able to be there for her daughter's big day.
The insider added to the Daily Mirror newspaper: "Courtney and Frances have had a strained relationship over the years, but after tons of fall outs they actually get on quite well now.
"Courtney is sad she wasn't there but she totally understands that Frances is her own person and she's happy to let her do her own thing. Plus, Isaiah is a really nice guy."
Meanwhile, Frances recently opened up about the late Nirvana front man, admitting she was never really a fan of the band.
She said: "I would have felt more awkward if I'd been a fan. I was around 15 when I realized he was inescapable. Even if I was in a car and had the radio on, there's my dad. He's larger than life. Our culture is obsessed with dead musicians."