"Arrow" season 3 spoilers reveal that the episode featuring Oliver and Felicity's relationship as well as her backstory is already being filmed. Meanwhile, cast Stephen Amell confirmed that he already worked with Charlotte Ross, who plays the mother of Emily Bett Rickards' character.

According to the "Arrow" season 3 spoilers by Cartermatt, citing multiple sources, shooting for the episode on the origins of Felicity Smoak has already begun. The episode is called "The Secret Origins of Felicity Smoak," which is a departure from the original "Oracle."

The website said "The Secret Origins of Felicity Smoak" will be the fifth episode for this season. It will follow, "The Calm," "Sara," "Corto Maltese" and "The Magician."

Meanwhile, while Oliver and Felicity will start dating, it's been hinted that he's going to meet her mother, although it's still speculation at this point.

On August 25, Stephen Amell took to Twitter and wrote: "So much fun working with @charlotteross this morning!"

The TVGuide earlier dished out "Arrow" season 3 spoilers as it said that Charlotte Ross will be seen in the November episode. However, it's not clear yet if she will appear in the flashback episodes or the current timeline.

Matt Webb Mitovich wrote "Arrow" season 3 spoilers at TVLine that the fifth episode will provide a backstory for Felicity Smoak, which also includes her time at the MIT.

In the episode "City of Blood," Felicity Smoak shared something about her mother: "If I had accepted things, I would be a cocktail waitress in Vegas like my mother and I never would have gone to college and I never would have moved a thousand miles away to work at Queen Consolidated.

Showrunner Marc Guggenheim also confirmed during the Comic-Con that Felicity would be highlighted more this season. "We have had a backstory for [Felicity] for over a year now that we keep saying, 'This is the episode where we're going to do it,' and we don't. But this is the year we're going to do it," he said.