Annie Murphy has paid tribute to her Schitt's Creek mother Catherine O'Hara

She wrote: "Ha-ha-HAAAA?!?! Her laugh was a perpetual Yes, And... It challenged anyone who heard it to join in, and be as delighted as she was. It challenged anyone who heard it to join in, and be as delighted as she was. Gosh, were we ever lucky to have her."

She also shared a note about what she had learned from working with Catherine.

She wrote: "She would have never presumed to call herself a teacher (too self-deprecating, too Canadian), but holy f***, was I ever a student. Here are a few Coles Notes for those who want to study.

"Giggles always. Jokes first. As long as they feel right in your bones.

"When you find the people you love and make you laugh, stick with your lovers and laughers.

"Everybody on set is a part of a community who (ideally) wants to make something great - treat them as such.

"Make suggestions, even if that means overstepping sometimes. Acknowledge if it doesn't work. Be appreciate to this who appreciate when it does."

Schitt's Creek co-creator and star Dan Levy also paid tribute, writing: "What a gift to have gotten to dance in the warm glow of Catherine O'Hara's brilliance for all those years.

"Having spent over fifty years collaborating with my Dad, Catherine was extended family before she ever played my family. It's hard to imagine a world without her in it. I will cherish every funny memory I was fortunate enough to make with her."

He added: "My heart goes out to Bo, Matthew, Luke and every member of her big, beautiful family."

And, his father Eugene Levy - who played Moira's husband Johnny Rose and had worked with Catherine in various projects since the 1970s - also remembered his late friend.

He told Us Weekly, he said: "Words seem inadequate to express the loss I feel today. I had the honour of knowing and working with the great Catherine O'Hara for over fifty years.

"From our beginnings on the Second City stage, to SCTV, to the movies we did with Chris Guest, to our six glorious years on Schitt's Creek, I cherished our working relationship, but most of all our friendship."

He concluded: "And I will miss her. My heart goes out to Bo, Matthew, Luke, and the entire O'Hara family."