Action stars Sylvester Stallone and Arnold Schwarzenegger will soon appear on screen together in "Expendables 3". But there was a time when the two couldn't bear to stand in the same room together.

Back in the 1980s, at the height of their fame, the duo starred in similar big budget action films and were also rivals, reports dailymail.co.uk.

Speaking about the feud with the "Terminator" star, Stallone said: "There were times when we could not even be in the same room. I was always like 'Oh it's him'.

"Arnold was like someone you wanted to strangle every day, like in the morning and at night. We were so competitive. He was Mr. Olympia (He won the Mr. Universe title at age 20 and went on to win the Mr. Olympia contest seven times). We came along at the same time, of course I was first but he was bigger.

"He is very smart. We became competitive and we could not be in the same room."

Stallone is best-known for his roles in the "Rocky" and "Rambo" films.