As promised, Bruno Mars and Anderson .Paak have delivered their new collaboration "Leave the Door Open."

The song is the first from the duo's new joint effort called Silk Sonic, with their album An Evening with Silk Sonic coming later this year. They first confirmed the project late last month. "We locked in and made an album," Mars tweeted, catching many fans by welcomed surprise.

Mars most recently had been riding high on the success of his 2016 album 24K Magic, having toured for two years in support of the album. Meanwhile, .Paak released his own album Ventura in 2019 and had a breakout role on last year's history-making film Trolls World Tour, for which he also contributed new music alongside Justin Timberlake and others. 

Hear "Leave the Door Open" below. (Updated)