The Obamas have adopted another Portuguese Water Dog, the same breed as their other dog, Bo.
Sunny was born a year ago in June in Michigan and arrived at the White House Monday.
The White House says in October, the First Lady told reporters that she hosted a doggie play date because Bo doesn't have enough dog interaction.
So now Bo gets to play big brother to young Sunny.
According to the White House, Sunny is the perfect little sister for Bo full of energy and very affectionate and the First Family picked her name because it fit her cheerful personality.
In honor of Sunny, the Obamas will make a donation to the Washington Humane Society.
The Obamas adopted Bo in April 2009.