"Say You Do" is the third single by British musician Sigala. It features British singer Imani and British musician DJ Fresh. It was released on 18 March 2016 as a digital download in the United Kingdom through Ministry of Sound. It is the follow-up to his previous single "Sweet Lovin'". The track interpolates a hook from Mariah Carey's 1996 hit "Always Be My Baby".
A music video to accompany the release of "Say You Do" was first released onto YouTube on 5 February 2016 at a total length of three minutes and thirty-one seconds. Imani appears throughout the whole video, while Sigala and DJ Fresh don't. The video was filmed at Montego Bay, Jamaica.