How many films have Michael Douglas and Danny DeVito starred in together?

Michael Douglas and Danny DeVito have starred in five films together.

Here they are:

1. Romancing the Stone (1984)

2. The Jewel of the Nile (1985)

3. War of the Roses (1989)

4. Twins (1988)

5. The Jewel of the Nile (1985)

While it might seem like there are only four films, The Jewel of the Nile appears twice because it's a sequel to Romancing the Stone.