The festival returns this summer after its maiden appearance in 2019.
Underworld will be joined by Nightmares on Wax on Friday July 31, with acts for Saturday and Sunday still be confirmed.
Organisers revealed today: "Playground Festival is delighted to announce the first of its line-up for 2020 ? the second edition of the Scottish festival. Performing on the main stage on Friday night, festival-goers can look forward to show-stopping performances from Underworld and Nightmares on Wax.
"Legendary electronic duo Underworld will top the bill on Friday evening with their only Scottish appearance in 2020 - accompanied by a mesmerising light and AV show.
"From sound-tracking Danny Boyle?s 1996 movie Trainspotting - with their classic anthem ?Born Slippy? - to being the musical directors for the 2012 London Olympics opening ceremony, Underworld have become internationally renowned for their visual style and dynamic live performances, which they have brought to audiences for over three decades.
"They will be supported by Nightmares on Wax, who will deliver another Scottish exclusive, performing his landmark cult-classic album ?Smokers Delight? live and in its entirety.
"Festival organisers can also announce local stalwarts, Let?s Go Way Back ? one of Glasgow's most legendary club nights, will provide local support. Further line-up announcements are due to follow shortly."
A festival spokesperson added: "This year?s line-up is a celebration of genre-defining UK icons.
"To have Underworld and Nightmares On Wax on the same bill on one night is the stuff of festival dreams and we can?t wait. It?s going to be a very special night."
Playground Festival 2020 is due to take place on Friday July 31, Saturday August 1 and Sunday August 2 in Rouken Glen Park in Giffnock, East Renfrewshire, where over 14,000 festivalgoers took in performances by the likes of Groove Armada, Hot Chip, Django Django and Anna Calvi.
Tickets for the festival can be purchased via www.playgroundofsound.co.uk and are priced from £49.00 for adults and £24.00 for children.