Irrfan says he was shocked to see the veteran actor looking so frail in the picture, which went viral on social media.
A picture today surfaced online where Khanna was seen in the hospital uniform along with his son and wife. The actor was seen visibly weak in the photo.
"My good wishes and prayers with him. I hope he gets well soon. If needed, I'll donate one of my organs to him. I think he is the most beautiful person in the entire industry," Irrfan told reporters at the trailer launch of his upcoming film "Hindi Medium".
Though Khanna's son Rahul had earlier confirmed that he was recovering, the actor is still in the hospital with no news of his discharge yet.
Recalling Khanna's work, Irrfan said, "I have seen all of his films. I still remember his 'Khoon Pasina', 'Mera Gaon Mera Desh'. He is one of the most handsome man, extremely beautiful."
Khanna was hospitalised in HN Reliance Foundation and Research Centre in Girgaum.