So with only one participant, I'm giving more chances to the rest of y'all.
He was a professional playwright and poet.
Worldwide, he arguably has higher name recognition than any other playwright (including Neil Simon!) -- although for the name he last worked under, not the name he was born with.
Many of his poems were published under the pen name, "Gruda," which translates to "a clod of earth."
Today's give-away clues:
Although not famous as an actor, whenever he delivered his celebrated balcony soliloquies, it was always to standing room only crowds.
One reason that he often published his early poems anonymously was because his day job at the time was illegal.
When I was a kid, I wanted to name two of my kittens after him. My brother decided to name two other kittens from that litter "George" and "Ringo." Weird, my brother is.