Richard Ashcroft, Seasick Steve and Squeeze have joined the support bill for Roger Waters' show at British Summer Time Hyde Park.
Waters will headline the AEG Presents/Goldenvoice-organised event on Friday, July 6.
Earlier this week it was announced that Paul Simon will close this year's festival on Sunday, July 15.
Billed as the legendary singer's "Farewell Performance", the line-up will also featuring special guests James Taylor & His All-Star Band and Bonnie Raitt.
The announcement completed BST Hyde Park's 2018 line-up, with other headline acts to include Eric Clapton, Michael Buble, Bruno Mars, The Cure and Roger Waters.
Tickets for The Cure (July 7) and Eric Clapton (July 8) have now sold out.