Robert Kennedy, Jr. I'm Helping Maria Find Love!

9/26/2013 12:10 AM PDT

Robert Kennedy, Jr. is on the hunt for someone to date his cousin, Maria Shriver.

We got Robert in Hollywood last night ... and he said Maria's on the hunt for a man -- especially since Arnold now has a GF.

The environmentalist advises potential suitors to write Ms. Shriver a letter.

Yeah, we're pretty sure he's being sarcastic.  But it's pretty funny.