WASHINGTON — Mary Cheney, daughter of former U.S. Vice President Dick Cheney, married longtime partner Heather Poe in Washington, D.C. on Friday, the family confirmed.

The two had been in a committed relationship for many years and were delighted that they could take advantage of the “opportunity to have the relationship recognized,” according to a statement released by Dick Cheney and his wife Lynne.

“Very happy to announce that as of this morning, Heather and I are legally married (at least in DC), 20 years to the day after our first date,” Mary Cheney posted on her Facebook page.