Click For Photo: http://i.dailymail.co.uk/i/newpix/2018/06/14/14/4D3985E900000578-0-image-a-18_1528982335750.jpgClick For Video: http://video.dailymail.co.uk/video/mol/2017/09/20/5951082099607224897/1024x576_MP4_5951082099607224897.mp4
They hooked up in April last year, following his divorce from No Doubt frontwoman Gwen Stefani.
And now Gavin Rossdale and girlfriend Sophia Thomalla have sparked engagement speculation after the blonde beauty was spotted wearing a huge ring on her wedding finger on Thursday as they stepped out in London's Primrose Hill.
Model - T-shirt - Image - Crate - Pair
The German model, 28, looked effortlessly chic in a black T-shirt adorned with the image of a crate, which she teamed with a pair of distressed skinny jeans.
Sophia kept her look low-key with black boots edged with a white sole, her blonde tresses scraped back into a simple knot and some simple gold hoop earrings.
Blonde - Beauty - Eyes - Touch - Glamour
The blonde beauty shielded her eyes and added a touch of glamour with a pair of black oversized shades.
Sophia was wearing a massive costume-style ring on her ring finger, which was unmissable due to its sheer size, prompting engagement speculation.
MailOnline - Representatives - Gavin - Rossdale - Comment
MailOnline has contacted representatives for Gavin Rossdale for comment.
Gavin donned casual khaki joggers, a plain black v-neck sweatshirt, a pair of trainers and black sunglasses for their outing.
Rocker - Ease - Hand-in-hand - Model - Primrose
The rocker, 52, looked completely at ease as he walked hand-in-hand with the German model, 28, around Primrose Hill, stopping for a drink at the Princess of Wales pub.
The couple basked in the sunshine...
Wake Up To Breaking News!