Chris Pratt has unveiled an interesting and funny video to promote his latest charity project. In the clip, the actor gave a quick tour of the “Guardians of the Galaxy 2” set and even almost revealed a major spoiler for the upcoming movie.

In a clip posted at Entertainment Tonight, the “Guardians of the Galaxy 2” star revealed that he has partnered with Omaze for the fundraising project. The project is aimed to raise funds to build a new center for the Boys and Girls Club located in the actor’s hometown in Washington’s Lake Stevens. Pratt explained that the interested participants or donors can get the chance to join him for one day on the set of the said movie.

He also proceeded to give a tour of the “Guardians of the Galaxy 2” set, from the costume department, props area and around the movie studio. The more than two-minute video also featured some funny scenes. One shot showed Pratt’s costume design drawings that looked as if a kindergarden student drew them. It also appeared as if most of Pratt’s ideas have been jokingly rejected, as evidenced by a bucket that had several papers inside it. The bucket was labeled “Rejected Chris Pratt Ideas.”

Elsewhere in the promo video, Pratt also showed off how some of the special effects in the film were shot. He was also very charming and quite generous in the video. He even almost revealed the identity of his character Star Lord’s father in the clip. “I’m just filled with the giving spirit of charity and I’m giving it all up. I’m revealing who Star Lord’s father is,” he stated in the video. However, he was stopped just in time by showrunner James Gunn who warned him about giving up spoilers.

Meanwhile, interested participants and donors can stand to win a behind-the-scenes tour of the “Guardians of the Galaxy 2” set and a chance to speak with Pratt over lunch, as stated on the charity’s website, Collider reported. The winner will also be flown into Atlanta and will be booked in a 4-star hotel over the one day visit.

“Guardians of the Galaxy 2” is set to hit movie theaters on May 5, 2017.