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Rachel McAdams was seen wiping her tears away with tissue while serving as bridesmaid at her younger sister Kayleen's wedding on Saturday, May 23. The event held at the Port Cunnington Lodge in Muskoka was attended by family and friends.

While holding a bouquet and standing beside other bridesmaids, Rachel appeared to be a little emotional for a while. However, she was all smiles for the rest of the solemn ceremony. Flaunting her toned figure, the "About Time" actress looked gorgeous in her sleeveless blue dress. She looked outstanding in blue while other bridesmaids wore pale colored dress.

Apparently the star of "The Vow" was very close to her sister. She was seen very helpful to the bride as she helped fix Kayleen's train. During the wedding ceremony, she was also made the maid of honor. A source told Us Weekly that the wedding was very touching. The source added that the family was very supportive to the newlyweds.

Kayleen is a makeup artist based in Los Angeles. She has been Sofia Vergara's makeup artist since 2010. Meanwhile, her elder sister, Rachel, will start promoting her latest film "Aloha", released on May 29 in the States. In this film, she co-stars with Bradley Cooper and Emma Stone.