Previously, a rep confirmed to The Hollywood Reporter Thursday that Lee was doing well after checking into the hospital, and at the time it appeared he would stay several days for routine tests, but apparently he was released early. Earlier Thursday evening, TMZ reported Lee was taken to Cedars-Sinai on Wednesday night after suffering shortness of breath and an irregular heartbeat.

Lee, 95, keeps a busy schedule and on Monday was out celebrating his latest creation to make it to the big screen at the Black Panther premiere, where he posed for photos with star Chadwick Boseman. Lee created the character in 1966 along with artist Jack Kirby. It has become customary for Lee to put in cameo appearances in Marvel films.

Feb. 1, 10:10 p.m. Updated with Lee's comments to ABC 7.