Actress Song Hye Kyo secretly participating in volunteer work has been revealed and making a buzz online.

Several photos of Song Hye Kyo volunteering at a stray animal shelter have been posted on an online community board recently. In the photos, the actress is seen wearing a working gown and a mask while holding up the dog.

Also included was a group shot of Song Hye Kyo took back in 2008 during a beach clean-up effort from the 2007 Taean peninsula oil spill, indicating Song regularly took part in volunteer activities.

Netizens commented, "Her inside is as pretty as her outside", "What an angel", "I’m so touched by her generosity" and "I’m now a Song Hye Gyo fan!"