The Chicago Cubs surprised fans with the chance to win free tickets Thursday. 

To win the tickets, fans had to visit the team’s pop-up mobile ballpark set up from 12 p.m. to 1 p.m. at the south promenade in Millennium Park. 

Fans who hit a home run at the event were given a free pair of 2017 Cubs tickets. Game tickets may include opening night and opening week, key match-ups, promo item games and more, the team said in an announcement on the event. [[414604523, C]]

To bring a taste of the Friendly Confines to Millennium Park, the Cubs’ Mobile Ballpark Wiffle Ball Home Run Derby also had food and drinks from Giordano’s, Vienna Beef, Fannie May and Red Bull. 

Updates were posted to the team's Facebook, Twitter and Instagram accounts throughout the morning. The Cubs’ mascot, Clark was at the event as well as Cubs’ Senior Vice President of Sales and Marketing Colin Faulkner, who served as spokesperson.