A source close to Hudson told People.com, "Kate and Matt have been on the rocks for some time. They're not in a great place."
Although they spent the holidays together in the UK, the two have been spending time apart since the beginning of the year. The source added Hudson and Bellamy “are still living together. Kate is not giving up."
Hudson showed up solo at Bulgari's Decades of Glamour event on Tuesday, where she was seen without her 9-carat engagement ring.
"Extra" caught up with Kate Hudson at the event where she joked that her stylist was her date.
The couple got engaged in 2011, and welcomed son Bingham, now 2, the same year. Hudson also has a 10-year-old son, Ryder, with ex-husband Chris Robinson of the Black Crowes.
When asked in January about wedding planning, Hudson told Kelly Ripa and Michael Strahan: "No, I'm planning nothing right now. I'm so busy, we've been so busy, and it's been great. I come from an unconventional family -- my parents aren't married. So there's a part of me that goes, 'If I'm going to do it, I'm going to do it right'… so, no. Not anytime soon, no."
Actress Kate Hudson and fiancé Matthew Bellamy are reportedly having trouble in their relationship.