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Camila Mendes and Rudy Mancuso are engaged

A source tells PEOPLE the musician and YouTube star proposed to the Riverdale alum during a "surprise engagement party" on Oct. 24

Sparks flew instantly when Mendes and Mancuso met on the set of their comedy romance film Música

Camila Mendes and Rudy Mancuso are engaged!

A representative for the actress confirms to PEOPLE that Mancuso, 33, proposed to Mendes, 31, on Friday, Oct. 24.

“She thought she was going to a birthday party for producing partner Rachel Matthews, but it was a surprise engagement party instead,” a source tells PEOPLE. “Rudy proposed to her in front of their family and friends.”

And the celebrations didn't end there. “Around 11 p.m., they were still celebrating, so they went to Glen Powell ’s tracksui

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