Sarah Michelle Gellar Reveals Her 4-Year-Old Son Was Rushed to the Hospital for a 'Nasty Virus'

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

Sarah Michelle Gellar experienced her first "helpless" moment as a parent.

The 39-year-old actress, who shares two kids with husband Freddie Prinze Jr., took to Instagram on Friday to reveal her 4-year-old son, Rocky, was recently rushed to the hospital.

WATCH: Sarah Michelle Gellar Shares Touching Tribute to 'Brave Friend' Shannen Doherty

Sharing a pic of Rocky wearing a hospital wristband and a bandage on his left index finger, Gellar revealed she "made it seven years" before she had to take one of her children to the emergency room.

"I think that's a pretty good stretch," she exclaimed. "It was a long night and apparently a nasty virus, but thankfully Rocky was released."

"I'm not going to lie, watching your child not be able to breathe, is the most helpless I have ever felt," she continued. "Thank you to all the great doctors and nurses (and staff) who work tirelessly 24 hours a day to help."

RELATED: Sarah Michelle Gellar Wishes Daughter Charlotte Happy Birthday With Sweet Throwback Pic

Gellar also thanked her 7-year-old daughter, Charlotte, for being a great support throughout the night.

"And thank you to his big sister, Charlotte, who would not leave his side," she gushed, also sharing that the "best moment" from their visit came when she was filling out her son's paperwork.

"I was asked if Rocky was single," Gellar revealed. "Laughter is definitely a great medicine."

The Cruel Intentions star also took to Twitter on Friday, writing, "Thank goodness for #iphones and #inspectorgadget when your little one is sick in the ER. (He's better and resting at home now #nastyvirus)."

Feel better, Rocky!

WATCH: Sarah Michelle Gellar Celebrates Her 14th Wedding Anniversary With Freddie Prinze Jr.

Gellar and Prinze, 40, celebrated their 14th wedding anniversary on Sept. 1, adorably gushing over each other via Instagram.

Watch the video below to hear their sweet messages!

Related Gallery