Wednesday fans gobsmacked as they realise where they've seen Judi Spannegel before

WARNING: This article contains spoilers from Wednesday season two.

Wednesday season two has arrived, and fans were surprised to see a familiar face from the 1990s join the cast.

Netflix launched its second series of Wednesday on Wednesday, August 6, featuring the eternally gloomy Wednesday Addams (played by Jenna Ortega) returning to Nevermore Academy.

READ MORE: UK's oldest first responder still saving lives at 88 - and says she'll never walk away

READ MORE: Never Mind The Buzzcocks star steps back after four years as replacement confirmed

It's not long before she's embroiled in another mystery, which begins with a vision of Enid Sinclair's (Emma Myers) death and quickly spirals into something much bigger.

Murderous crows have started to kill off people, and Wednesday is determined to uncover the reason. At one point, she suspects Tyler Galpin might be involved.

So, she heads to Willow Hill Psychiatric Hospital where he's being held. However, before she can confront Tyler, Wednesday must endure the overly cheerful Judi (Heather Matarazzo).

Judi serves as the executive assistant to chief psychiatrist Dr Rachael Fairburn (Thandiwe Newton), who oversees Tyler's care.

Wednesday briefly chats with Judi while waiting for her meeting with Dr Fairburn, but it's clear that the sarcastic teen is far from charmed by Judi's upbeat attitude and vibrant jumper.

Despite her brief appearance, fans were quick to recognise Judi as actress Heather Matarazzo.

The 42 year old has appeared in numerous films in recent years including Paint, The Zombie Wedding, and Booger, but she remains most famous for her role in 2001's The Princess Diaries.

Acting alongside Hollywood star Anne Hathaway, Matarazzo brought to life her outspoken best mate Lilly Moscovitz.

She later reprised her role in the 2004 follow-up and also portrayed Martha Meeks in the horror flicks Scream and Scream 3.

On Reddit, one user observed: "Guys it's Lilly. From Princess Diaries.

"Being overshadowed all those years as the bestie to royalty obviously led her to madness and the dark side."

Another user wrote: "I literally spent that whole scene trying to remember who she was."

Meanwhile, a third fan enthusiastically declared: "OMG is that lilly from The Princess Diaries."

What viewers weren't anticipating, though, was for Judi's role to be expanded in the midseason finale as it's unveiled that Judi is actually The Avian controlling the murderous crows.

She has been attempting to prevent Wednesday from discovering that Stonehurst (Phil Philparr), her father, had been conducting experiments on outcasts to steal their abilities and transfer them to "normies".

Judi, who was originally a "normie" before successfully transforming into an Avian, was carrying on his research but what will unfold in part two now her secrets have been exposed?

Wednesday is available to stream on Netflix.