McFly, Simple Minds and Travis are also set to perform at the bash at Princes Street Gardens, which runs from August 8-20.
The two-week event will kick off with Tom Jones performing on August 8 before Travis bring it all to a close on the 20th.
The Edinburgh Summer Sessions 2020 line-up is as follows:
8 – Tom Jones
9 – Lionel Richie
11 – Michael Kiwanuka
12 – The 1975
13 – McFly
18 – Simple Minds
20 – Travis
Tickets go on sale at 9am this Friday (January 31) and can be purchased here.
Making his Edinburgh Summer Sessions debut, Richie said, “I’m really looking forward to heading back to Scotland next summer, the crowds are some of the best in the world and I can’t wait to get back over there to see you all.”
Earlier this week, The 1975 were also announced for a headline performance at London’s Finsbury Park this summer which will see them taking a series of steps to minimise the event’s environmental impact.
Billed as “the greenest show Finsbury Park has ever seen”, the Manchester band will head to the capital on July 11 – joined by a supporting bill that includes the likes of Charli XCX, Clairo, Phoebe Bridgers and labelmates Pale Waves and Beabadoobee.