She is known for her roles in films such as Nebeska udica and Tears for Sale.
Sonja Kolačarić made her debut in 1999 film Sky Hook, directed by Ljubiša Samardžić and starring Nebojša Glogovac, Nikola Đuričko and Nikola Kojo.
She then made cameo appearances in films The White Suit in 1999, Srbokap in 2000, and Zapečen.
After minor appearances in the films E-Snuff in 2003, Slatki miris naftalina in 2004 and Snajper in 2006, and work in theatre plays, Kolačarić appeared in a leading role in the 2008 film Tears for Sale, starring alongside Katarina Radivojević.
She has also appeared on television, in the series Poslednja audijencija and in a leading role in Ono kao ljubav.