They join Sir Tom Jones and Jessie J for the music and motoring festival in August.
The Never Gonna Give You Up singer performs at the Shropshire venue on 24 July.
Fatboy Slim and Rick Astley feature on limited-edition baked beans cans handed out at a food bank.
The boy band and Eighties singer are the latest acts to perform at Live at Lincoln Castle in 2026.
Rick Astley recounts some of the weirdest places he has heard his 1987 hit Never Gonna Give You Up.
Rick Astley says he craved the spotlight because he didn't "get enough attention" from his parents.
The pop legend praises the "chilled" vibe at Camp Bestival before his headline performance.
England have pushed acts including Madness, Rick Astley and The Lightning Seeds down the bill.
Bosses say they had to cancel some tickets for the Rick Astley gig to test the venue "effectively".
