The Muse frontman began dating the Almost Famous actress in 2010 and they have a three-year-old son, Bing, but they announced their split in December (14) after a three-year engagement.
The former couple has remained tight-lipped over the break-up, except for a brief tweet from Bellamy thanking fans for their support, but now he has paid tribute to his ex.
Discussing how the split influenced him while recording the band's new album Drones, Bellamy tells Q magazine, "The album was quite difficult for me to make at certain points. My personal life went through a bit of a shift. All I can say is that she's a lovely person, we had a great relationship and we're good friends. It could've been a lot messier."
Since the split, Bellamy has been linked to actress/model Elle Evans.