United Kingdom, Sept. 15 -- Kelsea Ballerini and Chase Stokes have reportedly split.

The singer-songwriter and actor, both 32, were together for nearly three years.

A source close to the couple told People: "They're two adults who gave it their all and tried to do everything they could to make it work, but ultimately couldn't. It happens."

A reason for Kelsea and Chase's break-up is unknown.

The reports of the couple's split come three days after the Outer Banks star wished his "love" a very happy 32nd birthday on Instagram on September 12.

Captioning a photo carousel of him and Kelsea spending time with each other over the years, Chase wrote: "Although you keep saying you're not excited for 32, id say I'm lookin forward to more of t...