Ted Cruz endorsed Donald Trump for the presidency Friday afternoon, a stunning turn of events after a contentious primary filled with nasty personal attacks and a dramatic snub at the Republican National Convention.

"After many months of careful consideration, of prayer and searching my own conscience, I have decided that on Election Day, I will vote for the Republican nominee, Donald Trump," Cruz wrote in a Facebook post.

"A year ago, I pledged to endorse the Republican nominee, and I am honoring that commitment. And if you don't want to see a Hillary Clinton presidency, I encourage you to vote for him."

"I am greatly honored by the endorsement of Senator Cruz," Trump said in a statement obtained by CNN. "We have fought the battle and he was a tough and brilliant opponent. I look forward to working with him for many years to come in order to make America great again."