Who Are President Trump's Grandchildren? See the Photos

Some of the president's grandchildren looked on as he formally signed his Cabinet nominations into law at the Capitol in Washington, D.C., on Jan. 20, 2017.

So who are they?

Kai is the eldest child of Donald Trump Jr. and his estranged wife, Vanessa Trump. 

She was born in 2007 and is now 11.

She is pictured with her parents during the 2017 White House Easter Egg Roll.

The president's oldest son and his wife are pictured with baby Kai in September 2007.

Kai is pictured peeping over the top of her baby carrier in September 2007, when she was just 4 months old.

Her parents, Vanessa and Donald Jr., announced their plans to divorce earlier this year.

Donald Jr. kisses his daughter Kai. She is 16 months old in this photo from September 2008.

She has since become big sister to four siblings.

Donald Jr.'s second child is continuing the family name. Donald III was born in 2009.

He is pictured with his big sister, Kai, and their parents in December 2015.

Donald III is pictured here with his dad in September 2009, when he was 7 months old.

Donald III is pictured with his dad in 2010.

Vanessa Trump carries her son Tristan in 2017.

Tristan is the couple's third child. He was born in 2011 and is now 6 years old.

Tristan is pictured center with his parents, siblings, Uncle Eric and Aunt Lara.

This image was taken on Jan. 19, 2017, the day before President Trump's inauguration.

Spencer is the couple's fourth child. He was born in 2012 and is now 5 years old.

Pictured, Donald Jr. gets playful with Spencer at the White House Easter celebrations in April 2018.

Spencer looks unimpressed during a trip to Madison Square Garden with his dad and little sister, Chloe.

Donald Jr.'s three boys are pictured: 5-year-old Spencer, 6-year-old Tristan and 9-year-old Donald III.

Chloe is Donald Jr.'s youngest child. She was born in 2014 and is now 4 years old.

She is pictured at Madison Square Garden in New York City with her dad in January 2018.

Chloe is pictured with her father as he cast his ballot during the New York state primary presidential election in 2016.

Donald Jr. is pictured with four of his five children: Chloe, Spencer, Tristan and Donald III. Only his eldest child, Kai, is missing.

They are pictured together at the 2018 Professional Bull Riders Monster Energy Buck Off in New York City in January 2018.

Ivanka Trump is the president's second child and oldest daughter.

She is pictured with her husband, Jared Kushner, and their three children in November 2017.

Ivanka's oldest child, Arabella, was born in 2011 and is now 7 years old.

She is pictured with her parents along the Hudson River in New York City in 2014.

Arabella is pictured with her grandfather, President Trump, after a family weekend away in Bedminster, New Jersey. They are seen walking across the South Lawn of the White House in July 2018.

Joseph is Ivanka's oldest son. He was born in 2013 and will turn 5 in October.

He is pictured in his dad's lap at the 2017 White House Thanksgiving celebrations.

Joseph looks out of an Oval Office window before boarding Marine One in February 2017.

Theodore is Ivanka and Jared's youngest child. The 2-year-old was born in 2016.

He is pictured in his mom's arms during an event celebrating military members and their spouses in May 2017.

Jared, a senior White House adviser, carries his son Theo in November 2017.

Ivanka is pictured with her two oldest kids, Arabella and Joseph, outside their New York City home in 2017.

President Trump's third child, Eric Trump, welcomed a son last year.

Eric is pictured with his wife Lara, a former "Inside Edition" producer, during her pregnancy.

Eric Luke, who goes by Luke, is pictured with his dad during White House Easter celebrations in April 2018.

Luke is the president's youngest grandchild.

Luke is pictured with his mom, Lara, during a ribbon-cutting event for a new clubhouse at Trump Golf Links in the Bronx, New York, in June 2018.

Luke is pictured during Easter celebrations at the White House in April 2018.

Kai and Donald III pose for a photo with their cousins Arabella and Joseph at Disney On Ice Presents Frozen in New York in November 2014.

President Trump is pictured with his own children.

From left to right: Eric Trump, Lara Trump, the president, Barron Trump, Melania Trump, Vanessa Trump and Kai Trump, Donald Trump Jr. and Donald Trump III, Jared Kushner, Ivanka Trump and Tiffany Trump.

The image was taken in June 2015 after now-President Trump announced his plan to run for office.