"I hope she's okay."
After a commercial break, Garner confirmed Southgate did in fact nearly faint, but is "okay".
"We've spoken to her people as well, and she is okay but she appeared to be fainting during the latter part of that interview there," he said.
"She's feeling much better now. We're consistently in touch with her people as well. So we do wish you all the best and we hope you're okay," Garner said.
Southgate later laughed off the incident. She told Stuff that fainting on live television was "not the best start" to her week.
Through her spokeswoman, she said she was "absolutely fine and has thanked people for their concern".