05/26/2015 10:54 EDT | Updated 05/26/2015 10:59 EDT

Rachel McAdams Makes The Most Beautiful Bridesmaid At Sister's Wedding

And she's wearing something blue!

She may have played a bridesmaid in "Wedding Crashers," but Rachel McAdams reprised the role in real life for her sister Kayleen's wedding ceremony in Muskoka over the weekend.

The bride and her beau, Evan Turner, tied the knot at the Port Cunnington Lodge in Dwight, Ontario on Saturday.

For the occasion, the 36-year-old Canadian actress donned a beautiful knee-length cornflower blue halter dress by Zimmerman, which featured a draped, petal-style skirt. She paired the frock with Christian Louboutin stilettos. Her short locks were left down in loose curls and her makeup kept to a minimum.

Kayleen, who is a Los Angeles-based celebrity makeup artist, wore an ivory, lace halter gown with a mermaid-style skirt and a veil. The other bridesmaids wore various styles of mid-length dresses in cream, white, lilac and blue.

A source told Us Weekly the entire wedding weekend was "emotional" for the family, with Rachel wiping away tears with tissue during the ceremony.

Too sweet! Congrats to the happy couple!

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