A representative for Mick Jagger confirmed on Friday that the Rolling Stone frontman is "doing very well" after undergoing medical treatment this week.
The treatment has been widely reported to be a heart valve replacement procedure, though Jagger's representative, publicist Fran Curtis, declined to comment beyond the fact that he is "expected to make a full recovery."
"Thank you everyone for all your messages of support," Jagger tweeted Friday afternoon.
"I'm feeling much better now and on the mend - and also a huge thank you to all the hospital staff for doing a superb job."
The Stones announced Saturday that they would be postponing their latest tour so that Jagger, 75, could receive the treatment. Doctors told him that he "cannot go on tour at this time," according to a news release that announced the delay.
Jagger said in the release that he hated "letting our fans down," and apologized on his personal Twitter account as well: "I'm devastated for having to postpone the tour but I will be working very hard to be back on stage as soon as I can," he tweeted. "Once again, huge apologies to everyone."
The Stones' nationwide No Filter Tour was scheduled to kick off April 20 in Miami Gardens, Florida.
Billboard reported that it will probably be pushed to July, and the band will have to be replaced at the New Orleans Jazz & Heritage Festival in May.