Ghostbusters stars Kristen Wiig, Melissa McCarthy, Leslie Jones and Kate McKinnon took some time out from shooting this highly-anticipated reboot to stop by the Tufts Medical Center in Boston, wearing their full costumes. Ghostbusters has been shooting for the past month, and we've already seen the stars in their Ghostbusters costumes before, but these new images give us a better look at the proton packs each actress is wearing. Here's what a representative for the Tufts Medical Center had to say about the Saturday visit from the Ghostbusters on their Facebook page.

"Floating Hospital for Children at Tufts Medical Center patients got a huge surprise today when Ghostbusters stars Melissa McCarthy, Kristen Wiig, Kate McKinnon and Leslie Jones came to visit! Thank you for taking the time out of filming today to put a big smile on our patients faces! ‪#‎WhoYouGonnaCall‬ ‪#‎Ghostbusters‬"
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Kristen Wiig stars in the Ghostbusters reboot as Erin Gilbert, who, according to plot rumors, wrote a book several years ago with Melissa McCarthy's Abby Holtzman that claimed ghosts were real. After her teaching job at Columbia University falls through, after word of her book was revealed, she reunites with Abby and her new ghost-hunting partner Jillian Holtzman (Kate McKinnon). Leslie Jones plays Patty Tolan, an MTA worker who is rumored to have come face to face with the reboot's main ghost. It isn't known how much filming is left on the reboot, which Sony Pictures has set for release on July 22, 2016.

The supporting cast is rounded out by Chris Hemsworth as the new Ghostbusters' secretary, Andy Garcia as the mayor of New York City, Michael K. Williams as Hawkins, Matt Walsh as Rourke, Pat Kiernan as a New York City news anchor and Neil Casey as the villain. Original Ghostbusters star Dan Aykroyd is reportedly playing a cab driver who picks up Kristen Wiig's Erin Gilbert. The scene will only take up two minutes of screen time, but Dan Aykroyd reportedly gets to say the iconic line "I ain't afraid of no ghosts," to which Erin replies, "That's a double-negative! That means you are afraid of ghosts!"

There has also been a rumor that Bill Murray is playing a character named Martin Heiss. The character has been described as 'the villain', a professional ghost debunker, who is being compared to William Atherton's Walter Peck from the original movie. After he sees some of the videos these new Ghostbusters post online, he becomes determined to prove that they're fake, and "ends up at odds with the team through the whole film." Paul Feig directs from a script by Katie Dippold. Take a look at these new photos from Boston's Tufts Medical Center featuring the stars of Ghostbusters.