How Did Danny DeVito Balance Romancing the Stone?

Michael Douglas calls Danny DeVito one of his oldest friends. They have made three pictures together. On Romancing the Stone, the early picture, Michael Douglas did not have a real, clear part. A character was there, and Michael Douglas knew Danny DeVito could fill it out.

Romancing the Stone had to hold a delicate balance, a romantic adventure mixed with comedy. People said you really cannot do that. Danny DeVito came in and created material that was not in the script, and the new material helped keep the balance of the picture.

Michael Douglas asks who has had a longer career than Danny DeVito and notes that Danny DeVito was on Taxi. They were roommates in New York in 1976, and that is how long Michael Douglas has known him. Danny DeVito came out and visited him.