Marius Borg Høiby will serve four years in prison after being found guilty Monday of two charges of rape and assault and abuse in a close relationship.
Fonda, in counter-programming to Trump's UFC fight night, acknowledged her "personal stake" in the network as she joined several stars to defend the First Amendment.
The president's post came just hours after his widely criticized 80th birthday festivities, which included a UFC fight staged on the White House's lawn.