Patrick Muldoon’s Sister Posts Final Video He Sent Her

Patrick Muldoon showed off his humor and energy in the last video he ever sent his sister … even pulling out his old high school chant in the heartbreaking clip.

The actor’s sister, Shana Muldoon Zappa, shared the video to Instagram late Wednesday night … revealing her brother sent it on Saturday during a preview opening of the new Los Angeles County Museum of Art.

Check out the clip … Muldoon excitedly films a painting of St. Ignatius of Loyola — before breaking out into a chant.

Zappa explains her bro was a fan of the saint … and, he went to Loyola High School — so, the chant is a nod to his football-playing days way back when.

She remembers her brother as “the joke-ster, the artist, the football player, and the intensely spiritually connected, Jesuit-educated, incredible being.”

Zappa adds the family will eventually hold a service … but, they’re still in the middle of processing their grief — and, they haven’t planned anything yet.

As you know … Muldoon was pronounced dead after his girlfriend found him unconscious in the shower Sunday. His last few Instagram posts showed no signs of distress — instead showing a man just living his life before his tragic passing.