I worked with Cecil B DeMille quite a few times.
Meaning of the quote
Richard Farnsworth worked with a famous movie director named Cecil B. DeMille many times. DeMille was a very successful and well-known filmmaker, and Farnsworth, as an actor, got to work with him on several different projects over the years.

About Richard Farnsworth
Richard Farnsworth was an acclaimed American actor and stuntman who was twice nominated for an Academy Award. He had a long and successful career in film, appearing in memorable roles in movies like The Grey Fox, Anne of Green Gables, and Misery.
More quotes from Richard Farnsworth
But I don’t really care for directors flaring up and trying to humble some actor, which they would do to try and make an example out of them so everybody else would stay on the ball – and David wasn’t anything like that.
American actor (1920-2000)
David Lynch was very good, very patient with us, and the reaction in the United States seems pretty good.
American actor (1920-2000)
I worked with Cecil B DeMille quite a few times.
American actor (1920-2000)
I don’t know if you saw the parting of the Red Sea with the chariots on the horses, I did stuff like that.
American actor (1920-2000)
I worked for Sam Peckinpah on quite a bit of action in his films, and he got excited once in a while.
American actor (1920-2000)
No I didn’t audition, I didn’t even know David Lynch till the week before I started the film.
American actor (1920-2000)
I worked for John Ford, Howard Hawks, Henry Hathaway, Raoul Walsh – I worked for some real good directors.
American actor (1920-2000)
I was a stunt man for 35 years.
American actor (1920-2000)