Chantelois said he spoke to Trudeau recently at his office in Ottawa, where he was "very surprised" and "very excited" to hear he would be the first Canadian prime minister to take part.
“It’s a nice way to make history,” Chantelois said.
He said Trudeau also showed a deep understanding and commitment to issues facing the LGBT community in Canada.
"When we met him in his office, he was really serious about talking about trans rights, about equal rights, about immigration, about gay men donating blood," Chantelois said. "All these things are very important topics for him.”