Estevez tweeted a photo of his 75-year-old dad in the hospital. In the picture, Sheen is giving the thumbs-up sign while holding what looks like a heart pillow that partially obscures his face.
"My Pop! Successful proactive quadruple bypass surgery this week! A great Blessing indeed!" Estevez wrote.
A Facebook post from Estevez explains that Sheen had the surgery last weekend at a Los Angeles hospital. "The decision to operate on his heart was a proactive one, not an emergency situation," Estevez noted.
Estevez added, "Not surprisingly, he is recovering beautifully, out of the ICU and is expected to not only be home for Christmas, but be 100% by the time he returns to work on season three of the Netflix series, 'Grace and Frankie' early next year."