This was certainly true for actor Carrie Fisher, known best as 'Princess Leia' from the original Star Wars Trilogy. A close gay friend, republican operative Robert Gregory Stevens, visited her in February 2005. He enjoyed a good party and was quite fond of recreational drug use, something Fisher had battled in her past. He slept in her bed, allowing his female assistant to have the guest room of Fisher's beautiful old home in Beverly Hills. On the night of February 25, he returned very late and the two fell asleep after midnight. Bruce Cohen arrived early the following day to take Carrie to tango lessons. To her horror, Stevens had passed away in the night. She woke up beside the corpse of her friend.
Being carted away by the coroner was not the final exit of Stevens from Fisher's home. His death sparked a string of strange phenomena in her home leading her to believe his ghost remained behind. There were footsteps and light switches with minds of their own. The activity gave her another breakdown. Drugs seemed to be her only escape. After some time, the paranormal activity ceased, though Fisher can't be sure he has left for good.
Carrie went on Celebrity Ghost Stories during its first season to tell her story. Her experience is followed by a few other noteworthy people: gay cult filmmaker John Waters and Golden Girls star Rue McClanahan. Here's the full episode. Carrie Fisher's story is first. Immediately after it is Waters and his childhood experience.