The Housemaid’s Secret Adds Stephen Kalyn as Sydney Sweeney Sequel Expands Its Cast

Kalyn has officially joined Lionsgate’s sequel as Brock Cunningham.

The character is a lawyer who enters Millie's life as a new romantic interest, apparently unaware of some of the darker parts of her past.

That's potentially quite a dangerous position to occupy in this particular franchise.

Millie isn't exactly heading into the sequel with a clean slate, and The Housemaid’s Secret will once again place her inside a wealthy household where appearances cannot necessarily be trusted.

Kalyn's casting also comes while his profile is rapidly growing.

His performance as Dean Di Laurentis in Off Campus turned him into one of the show's breakout stars, and The Housemaid’s Secret now gives him a substantial role in an established big-screen thriller franchise.

Sydney Sweeney will reprise her role as Millie Calloway following the success of the first Housemaid film.

This time, Millie accepts another housekeeping job as she tries to move forward with her life.

Naturally, things don't stay straightforward for very long.

Her new employers are the Garricks, and Millie is given one particularly strange instruction: she isn't supposed to see Wendy Garrick.

What initially seems like another job gradually turns into something far more unsettling as Millie begins to question what is happening behind a locked door inside the house.

Kirsten Dunst will play Wendy, while Paul Anthony Kelly takes the role of her wealthy husband, Douglas Garrick.

Brittany Snow is also joining the sequel as Marybeth.

For audiences discovering Kalyn through Off Campus, Brock should provide an interesting change of pace.

Off Campus has established him in the world of contemporary romance, while The Housemaid’s Secret drops him into something considerably darker.

The sequel is based on Freida McFadden's second novel in the enormously successful Housemaid series and once again mixes relationships with secrets, manipulation and psychological suspense.

Brock's relationship with Millie means Kalyn isn't simply being added around the edges either.

He'll be entering Millie's personal life directly as she becomes increasingly involved in whatever is happening inside the Garrick household.

Knowing this franchise, we'd probably advise Brock not to get too comfortable.

Paul Feig is returning behind the camera for The Housemaid’s Secret, with Rebecca Sonnenshine returning to write the screenplay.

That gives the sequel some useful continuity even as several new characters enter Millie's world.

The original film introduced Sweeney's Millie as a young woman attempting to start again by taking a live-in housekeeping position with Nina and Andrew Winchester.

What initially seemed like an opportunity for a fresh start instead dragged her into a household filled with manipulation, secrets, and shifting power.

The sequel effectively gives Millie another chance to make the same mistake.

Different house.

Different family.

And, apparently, another locked door she probably shouldn't open.

We suspect she will anyway.

This feels like smart casting.

Stephen Kalyn is arriving with considerably more attention around him following Off Campus, while The Housemaid has already established Millie Calloway as a character audiences are willing to follow into another nightmare.

Putting the two together makes sense.

But we're probably even more interested in Kirsten Dunst joining this world.

Dunst playing the mysterious woman Millie isn't even supposed to see sounds exactly like the sort of casting this franchise can have some fun with.

And with Paul Feig back directing, Sydney Sweeney returning and an increasingly interesting group of actors surrounding her, The Housemaid’s Secret is starting to look less like a quick sequel and more like Lionsgate seriously building The Housemaid into an ongoing thriller franchise.

Adding one of Off Campus' biggest breakout names certainly won't hurt.

The Housemaid’s Secret is currently scheduled to arrive in cinemas on December 17, 2027.