• Review of "The Birth Of" a true story where Sierra played a young violent mother battling bulimia and body image dysmorphia:

"I wanted to tell you what an amazing job you did portraying my sister in the film. It literally brought me to tears & took me back to the days when I once lived with them witnessing the emotional abuse that Stacie suffered at the hands of her Mother, and also witnessing the height of Vickie's eating disorder. Watching your facial expressions and emotions during this film, and looking into your eyes, seemed as though I was looking into the eyes of my sister back then. It felt like I was reliving that moment in time, because the accuracy in the emotion that you performed while in character of my sister was spot on! It was surreal in every way. What a fantastic performance!"

• "The connection I formed with Sierra was instant and one of a kind. She has an incredible talent for not only understanding character but actually living a character as she brings life to it--each detail is fleshed out impeccably. Throughout each moment in our collaboration she was a reminder why I am passionate about film and the moments spent working with her are the moments that I absolutely live for as a director." Simon Sager - Director of "A Solitary Color"

• "Sierra is an exceptional actress and a dream to work with. She was the main bright spot that inspired me on the shoot. She is always prepared and delivers a rich performance by inhabiting several nuances to her character. It was a real pleasure to work with her on my film and I would love to collaborate with her again." Patrick O'Bell, Director - Lost Order Films

•  “Sierra Mercier delivers more than just enthusiasm and focus in every voiceover session. Her years as a professional performer is evident in the confidence and attitude she brings. I can always count on her to give 110%.” Marc Cashman - Voice Over Coach

• "Sierra is an incredibly positive force on set. She is open to exploration, direction, and discussion. She is that special kind of actor who makes the work more fulfilling, and more fun." Will Ilgen, Director - Tzu Chi Foundation

• "Sierra was an absolute professional on set everyday. An intelligent actress, that displayed a range of emotion and devotion to bring her character to life. She takes her craft seriously as an artist. I would recommend Sierra any day of the week, if you're looking for someone talented to cast." Davis Noir, Director - AWP Films

• “It was a real pleasure to work with Sierra- she took direction very well, bringing always the best positive attitude forward brightening the work day with her infectious smile. She was very professional and definitely very talented. I would certainly recommend her for future projects.” Heidy Fu, Herbalife - Creative Manager