He is first seen at Tin Toy's party when he encounters Woody and Bo Peep. He gets Woody, Buzz Lightyear, Bo Peep, Giggle McDimples, Ducky and Bunny to the antique store to rescue Forky, but when they run into Gabby Gabby and her troupe, they exit the store and Duke crashes. Woody begs him and everyone to return to the store, but he and everyone leave and give up.
After Woody gives his voice box to Gabby Gabby, Duke returns with the gang and gets them to ground. Duke is happily proud that Gabby Gabby has gotten an owner and he is present when Woody returns to the gang and says goodbye to Buzz Lightyear and Forky, and he decides to live with Bo Peep.
Duke is played by Keanu Reeves in Toy Story 4, who also played Ted Logan in Bill & Ted's Excellent Adventure, that had a quick cameo in The LEGO Movie 2: The Second Part.