Another member of the American political dynasty, the Kennedys, deliver ed the Democratic response to President Trump's State of the Union speech . But what do we know about him?
He has one of the most famous surnames in US history.
Now US Representative Joe Kennedy III has stepped into the national spotlight as he delivered the traditional rebuttal to the president's State of the Union.
Although well known in Massachusetts political circles, this was the first time Mr Kennedy came to "prime time".
Where is he in the famous family?
He is the grandson of the late US Senator Robert Kennedy and great-nephew of the late US President John F Kennedy.
And what does he do?
The 37-year-old is currently serving his third term as US Representative of Massachusetts 4th Congressional District. He's been in Congress since 2013.
He lives in Newton, Massachusetts, with his wife Lauren Birchfield Kennedy and children Eleanor and James.