Tony Danza -- Danny Pintauro Is An Incredible Kid (VIDEO)

Tony Danza says his former "Who's The Boss" co-star Danny Pintauro is making the world a better place by coming out as HIV positive.

Our photog caught Danza leaving the Jerry Weintraub memorial after-party at Craig's Sunday night ... the day after Pintauro, who played Jonathan on Danza's '80s sitcom, told Oprah he's been living with the virus for the past 12 years.

Danza sings Pintauro's praises.