Which K-pop Idols has left their groups to pursue a career as an actor?

f(x)'s Sulli has announced that she will leave the group to focus on her acting career, as many fan's attention is on Kpop idols who has left group to pursue their acting career.

On 25th, Sulli is reported to have officially left f(x) to pursue a solo career in acting. This comes after months and months of speculation that the singer has not been active with f(x) for quite some time now.

Lee Joon and Thunder (Park Sang Hyun,) both of whom recently left idol group MBLAQ, are pursuing acting career as well.
Thunder is currently starring in MBC weekend drama "Make a woman cry"
Lee Joon has finished the shooting of SBS drama "Heard It Through the Grapevine" and waiting for release of his recent film the "The guests".

Sohee, one of the original members of the Wonder Girls, has starred in tvN's romantic comedy "Heart to Heart" which aired earlier this year after leaving the Wonder Girls and JYP Entertainment in December 2013.
She is now with BH Entertainment and intends to focus on her acting career under her new management.

Kang Jiyoung, former member of the Kara, has been working as an actress in Japan after the withdrawal from the group.