A high school senior in North Dakota told his parents he didn’t have anyone he wanted to ask to his senior prom until his father told him to take his great-grandmother.

KFYR reports Watford City senior Dakota Wollan made his great-grandmother’s night by taking her to her first prom.

“I couldn’t believe I was out there,” said Wollan’s great-grandmother Madeline Miller.

Wollan said it all started with a prom proposal.