Rep. Joe Kennedy III, D-Mass., a member of one of America’s most prominent political families, is taking the national stage to give the Democratic response to President Trump’s State of the Union address on Tuesday night. 

House Minority Leader Nancy Pelosi, who announced the news with Senate Minority Leader Chuck Schumer on Jan. 25, labeled Kennedy as a “relentless fighter for working Americans.”

“From health care to economic justice to civil rights, the Democratic agenda stands in powerful contrast to President Trump’s broken promises to American families,” Kennedy said in a statement. “Our vision for this union is guided by a simple belief that equality and economic dignity should be afforded to every American.”

The 37-year-old also said that he’s “honored” to have been chosen to deliver the party’s response.

Ahead of Kennedy’s rebuttal on Tuesday, here’s what you need to know about the representative.

Who is he?

Kennedy is the son of Joe Kennedy II, a six-term Massachusetts congressman. He’s also the grandson of Sen. Robert Kennedy, who was assassinated in 1968. And his two great uncles are former President John F. Kennedy and former Sen. Edward “Ted” Kennedy. (It’s worth noting that in 1982 Sen. Edward Kennedy, along with other Democrats at the time, gave a pre-recorded response to former President Ronald Reagan’s State of the Union message).

U.S. Congressman Joe Kennedy III stands next to a poster of a stamp of featuring his great-uncle, U.S. President John F. Kennedy, during ceremonies on the 100th anniversary of the birth of President Kennedy outside the home where he was born in Brookline, Massachusetts, U.S., May 29, 2017. REUTERS/Brian Snyder - RC1B120E0090

Kennedy, currently serving his third term, was born and raised in Massachusetts. He’s a graduate of Stanford University, where he earned a bachelor’s degree in management science and engineering, according to his biography. He later attended Harvard Law School, graduating with a J.D.

He and his wife, Lauren, a health policy expert, met during a class that Sen. Elizabeth Warren, D-Mass., taught at Harvard. The couple has two children together, a young daughter named Eleanor and a son, James, who was born in December 2017.

The young family lives with their dog, Banjo, in Newton.

A lawyer turned politician

Before entering politics, Kennedy served in the Peace Corps and then as an assistant district attorney in eastern Massachusetts, where he  worked for Michael O’Keefe, “an old-school rough-around-the-collar Republican,” Peter Ubertaccio, a professor of political science at Stonehill College, a school outside of Boston, told Fox News.

“It’s an interesting part of his career — that’s really where he got his start,” he added.

In 2012, Kennedy ran for a seat in Massachusetts’ fourth district after Barney Frank, a longtime Democratic congressman, announced his retirement.

Frank’s retirement was unexpected, said Ubertaccio. But for Kennedy, the timing served as the perfect way for him to “enter politics the way he wanted.”

As a representative, Kennedy has focused on educational access, healthcare and has “continued the conversation around STEM and STEM training,” Ubertaccio said. STEM is an acronym for science, technology, engineering and math.

“He understands what it means to be a Kennedy. But he doesn’t rest on that name. He works hard to develop his [personal] reputation.”

– Peter Ubertaccio

Kennedy is also a member of the House Energy & Commerce Committee, where he’s focused on issues like mental health, addiction and energy costs, among other things. In the past, he was a co-sponsor of the Paycheck Fairness Act and opposed the Defense of Marriage Act (DOMA). The representative has also advocated for LGBTQ equality, voting rights and civil rights.

“He understands what it means to be a Kennedy. But he doesn’t rest on that name. He works hard to develop his [personal] reputation,” Ubertaccio said.

What does giving the rebuttal mean for Kennedy’s career?

Kennedy has a good reputation in his home state, said Ubertaccio.

“He’s developed a reputation for himself in Massachusetts as thoughtful and conscientious,” he said. And while Kennedy can be “passionate and aggressive” on issues that he deeply cares about, the Massachusetts representative has worked in a “bipartisan fashion which is still expected in the state despite its liberal reputation.”

But the rising political star has largely lacked national recognition up until now. Indeed, aside from introducing Sen. Warren at the 2016 Democratic National Convention, giving the rebuttal at the State of the Union is arguably one of Kennedy’s most significant political moves to-date, said Ubertaccio.

“The national recognition will benefit him. If he wants to move up politically, this opportunity raises his profile,” he added.

And giving the response does not just benefit the representative, Ubertaccio added. It also could be an advantage for the Democratic Party.

“In a time when the Democratic Party is struggling with its image, it’s a smart political move to give a young leader the rebuttal,” he said. “He’s done an excellent job in Congress and is well regarded by those across the [political] aisle.”

Madeline Farber is a Reporter for Fox News. You can follow her on Twitter @MaddieFarberUDK.