J. Scott Applewhite, Pool via AP
President Donald Trump is joined by his grandchildren, from left, Donald Trump III, Arabella Trump, and Tristan Trump, as he formally signs his cabinet nominations into law, in the President's Room of the Senate, at the Capitol in Washington, Friday, Jan. 20, 2017, just after his inauguration.
- The presidents' families are some of the most-watched children and grandchildren in the country.
- The vast majority of presidents were parents when they were sworn into office, but far less were grandparents.
- Visit Business Insider's homepage for more stories.
First families have come into the White House with children of all ages, and even first sons and daughters who weren't children at all.
Though it's overwhelmingly common for presidents to take office after they've become parents, it's less common for grandparents to be sworn into office.
However, having grandchildren around can really bring out the softer side of the Commander-in-Chief. See 13 photos of former and current presidents and their grandchildren, big and small.