Daniel Baer, U.S. ambassador to the Organization for Security & Cooperation in Europe (OSCE), married his partner Brian Walsh on Saturday in Vienna, Austria.

According to the Human Rights Campaign (HRC), the nation's largest LGBT rights advocate, Baer and Walsh exchanged vows the surrounded by family and friends, including HRC President Chad Griffin.

After the ceremony, Baer thanked President Barack Obama, Secretary of State John Kerry and Hillary Clinton, the former senator from New York, secretary of state and first lady.

“So, I got married this morning. Thank you @BarackObama, @HillaryClinton, & @JohnKerry for your commitment to equality,” he tweeted to his more than 3,000 followers along with a photo from the wedding.

Baer was sworn in as ambassador in September, 2013.