Sporting a star-spangled suit, Jackson welcomed viewers to the halftime show with a hearty, "Salutations, it's your Uncle Sam."

In a surprise opening to Kendrick Lamar's halftime performance during Super Bowl LIX, Samuel L. Jackson went front and center dressed as Uncle Sam before introducing Lamar to the stage. In line with the theme of "The Great American Game," Jackson was dressed in full red, white and blue garb to introduce the act and then play a role within it.

Samuel L. Jackson interrupts Kendrick Lamar's Super Bowl halftime show: 'Tighten up!' The NFL said the person was part of the 400-member field cast and had hidden the flag on himself before the halftime show began Sunday night.

Drake got dissed in "Not Like Us," Jackson played Uncle Sam as President Trump looked on, and Serena Williams danced in a surprise cameo.

Between Samuel L. Jackson dressing up as Uncle Sam and the backup dancers, Kendrick Lamar's Super Bowl Halftime performance was full of messages.

Kendrick Lamar’s history-making Super Bowl LIX halftime performance wowed the crowd on Sunday night. As the first solo hip-hop artist to headline the show, he brought out Samuel L. Jackson to play Uncle Sam and even had a cameo by tennis great Serena Williams.