Megan Hilty's pregnant sister, brother-in-law, and nephew died in a floatplane.

Picture Credit: Instagram

Megan tweeted,

"On Sunday afternoon, a small float plane crashed into Puget Sound off the coast of Whidbey Island

My beloved sister Lauren, brother-in-law Ross and baby nephew Remy were on that plane," in a lengthy Instagram post.

Further, she added, "To make this news even more devastating, my sister was eight months pregnant and we were expecting to welcome baby boy

Fox News reports that Hilty said admitting the tragedy was the "last thing" she wanted to do, but untrustworthy news sources convinced her otherwise.

"It's come to my attention that several news outlets have misgendered my sweet nephew and some haven't even mentioned baby Luca

Hilty wrote. "Lauren and Ross left behind my niece, who we all hold in our hearts.

Thankfully, she was not on the plane.

It is important these details be corrected to respectfully honour everyone we've lost and the loved ones they've left behind," Hilty added.

The actor praised her fans for their "love and support" after the accident.