"The Umbrella Academy" star was married for three years and came out as transgender last month.
"Your love and support has been the greatest gift," the actor wrote.
“I need to apologise for my reaction that I had," the TV host said.
"Elliot’s existence is a gift in and of itself. Shine on sweet E. Love you so much," Emma Portner wrote.
Australian actors Daniielle Alexis and Suzy Wrong also spoke about the 'Juno' star's emotional post.
"I want to share with you that I am trans, my pronouns are he/they and my name is Elliot," the actor wrote on Twitter.