The UK rapper has teamed up with Professor Green for 'Top of the World', which will be released on August 20 through Warner Bros. Records.
The accompanying music video sees both artists performing the track together along with guest vocalist Tawiah.
London-born Smiler collaborated with Professor Green after supporting his headline tour last year.
'Top of the World' follows Smiler's recent collaboration with Lana Del Rey titled 'Spender'.
The star included the track, which features a sample of Dame Shirley Bassey's classic hit 'Big Spender', on his free All I Know mixtape earlier this year.
Watch the music video for Smiler, Professor Green and Tawiah's 'Top of the World' below: