Solanke, who grew up in Portarlington, County Laois, before his family relocated to Dublin, came through the Shamrock Rovers academy before joining Lorient at the start of 2025.
The move to the French club was engineered to circumvent post-Brexit rules that prevented Bournemouth signing him directly at 16 — transfers within the EU were still permitted at that age, making the Lorient route the only option available.
As soon as Solanke turned 18 in January, Bournemouth moved quickly to complete the signing on a long-term deal, with the left-back joining the club's Under-21 setup and having already trained with the senior squad.
"I am over the moon," Solanke said. "I feel it's been a long time coming but I'm delighted to be here. With Bournemouth being a Premier League club, a move like this is something I've dreamt of. The vision of where everyone wants this club to go played a big part in my decision."
Solanke represented Ireland 31 times across various age groups and featured at the FIFA Under-17 World Cup in Qatar last November, where he caught the eye with his attacking qualities from left-back as Ireland reached the last 16.
The signing follows the same Lorient pipeline that produced forward Eli Junior Kroupi, who has scored seven Premier League goals since arriving at the club last summer. Rose, who takes over from Andoni Iraola ahead of next season, will inherit a young squad built around this kind of long-term recruitment model.