Actor Sylvester Stallone announced Monday that he has separated from his wife of 19 months, Danish-born actress Brigitte Nielsen, and filed for divorce on grounds of irreconcilable differences. The announcement, which followed months of denials by the 41-year-old star of "Rocky" and "Rambo" was made by Stallone's publicist. Stallone, who has two children from his 10-year marriage to Sasha Stallone, wed Nielsen, 24, in December, 1985, in a tightly guarded private ceremony. Nielsen was also married once before. Nielsen, who is featured in "Beverly Hills Cop II," said she fell in love with Stallone when, as a teen-ager, she saw the film "Rocky." She appeared with Stallone in "Rocky IV." In March, Stallone issued a statement saying that "vicious rumors that we are separating and getting a divorce are totally false and inaccurate."