Chris Pratt celebrated a milestone birthday with his oldest child.

Pratt, 46, reveled in the fact that he now has a teenager at home as he honored his son Jack on his 13th birthday.

The "Guardians of the Galaxy" star shared a rare gallery of fun times on social media Sunday to mark Jack's big day. 

Pratt and his ex-wife, Anna Faris, welcomed Jack in 2012 and have co-parented since their split in 2017.

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"I have a teenager???" Pratt wrote over a collection of images shared to his Instagram stories. "Jack, I can't believe you are 13 today. I've watched you grow into such an incredible young man, and am truly proud of the person you are becoming."

Chris and Jack were pictured wearing matching Dodgers jerseys in one snap, before swapping sports and celebrating as Detroit Lions fans. Jack tried his hand at feeding a baby cow in another shot before finding a groove while welding. 

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Pratt ended the shout-out with, "I love you! Jesus is King!"

During a March appearance on "Fox & Friends," Pratt explained that his stance on faith changed when Jack was brought into this world. Back in 2012, Jack was born seven weeks early and only weighed 3 pounds, 10 ounces. Pratt recalled the life-altering moment in which he had to make "deals with God" to save his son.

"The most impactful moment was when my son was born. He was born early and had some health scares, and in that moment, I really made some deals with God, as you do when you're praying, and I felt like if you save my son, I will give you everything."

"I'll give you my life. I'll give you my platform. I won't be ashamed to talk to you or talk about you. And he did save my son, and I've been trying to make good on that promise ever since," Pratt said.

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Pratt and Faris were married for eight years before their divorce was finalized in 2018. The "Parks & Recreation" actor went on to marry Katherine Schwarzenegger in June 2019 after meeting at church. 

Schwarzenegger's mom, Maria Shriver, helped set up the pair, and they eventually wed during a ceremony held in Montecito, California. The couple welcomed their first daughter, Lyla, in August 2020. 

Their second daughter, Eloise, was born in May 2022, and the couple welcomed son Ford in November.

President Donald Trump said Sunday that Ukrainian President Volodymyr Zelenskyy could end the war with Russia "almost immediately" if he wanted. 

Trump's comments come ahead of his scheduled meeting with Zelenskyy and several European leaders in Washington, D.C. on Monday.

"President Zelenskyy of Ukraine can end the war with Russia almost immediately, if he wants to, or he can continue to fight," Trump said in a post on Truth Social. "Remember how it started. No getting back Obama given Crimea (12 years ago, without a shot being fired!), and NO GOING INTO NATO BY UKRAINE. Some things never change!!!"

NATO Secretary General Mark Rutte, European Commission President Ursula von der Leyen, French President Emmanuel Macron, British Prime Minister Keir Starmer, German Chancellor Friedrich Merz, Italian Prime Minister Giorgia Meloni, and Finnish President Alexander Stubb confirmed Sunday they would attend the meeting in Washington.

EUROPEAN LEADERS WILL JOIN TRUMP-ZELENSKYY MEETING, SIGNALING SOLIDARITY WITH UKRAINE

Their joint presence underscores Europe’s push to present a united front as Russia’s war drags on.

Zelenskyy met von der Leyen in Brussels ahead of the Trump talks to set priorities for the White House meeting, focusing on long-term military aid, Ukraine’s EU ambitions, and bolstering transatlantic solidarity against Russian aggression.

Von der Leyen said at a joint press conference she was glad to join Zelenskyy and other leaders in Washington on Monday.

Trump called it a "great honor." 

ZELENSKYY OUTLINES PEACE DEMANDS BEFORE HIGH-STAKES WHITE HOUSE MEETING WITH TRUMP

"Big day at the White House tomorrow. Never had so many European Leaders at one time. My great honor to host them!!!" he said in another post on Truth Social.

"The Fake News has been saying for 3 days that I suffered a ‘major defeat’ by allowing President Vladimir Putin of Russia to have a major Summit in the United States," Trump said in another post. "Actually, he would have loved doing the meeting anywhere else but the U.S., and the Fake News knows this. It was a major point of contention! If we had the Summit elsewhere, the Democrat run and controlled media would have said what a terrible thing THAT was.

"These people are sick! They even want CRIME IN D.C., and other BLUE Cities throughout our Country, but don’t worry, I won’t let that happen," the president continued. "Just like our now secure Southern Border (ZERO illegals in last 3 months!), our cities will be Secure and Safe, and D.C. will lead the way!"

SUMMIT WITH PUTIN SET TO TOP TRUMP’S AGENDA THIS WEEK AS UKRAINE WAR TAKES CENTER STAGE

Zelenskyy’s White House meeting follows Trump’s summit with Russian President Vladimir Putin in Anchorage on Friday, where Trump dropped his ceasefire demand and urged a final peace deal.

After meeting with Putin, Trump said the Russian leader was willing to end the war in exchange for key Ukrainian territorial concessions. He added that Kyiv should take the deal because "Russia is a very big power, and they're not."

Zelenskyy and European leaders consistently reject proposals to surrender Ukrainian land to Russia.

Fox News Digital’s Amanda Macias contributed to this report.