Is it just us, or has Hollywood been dishing out a serious case of deja vu?
You would think that out of the myriad of actors available, you'd get a variety of combinations on the big screen.
So why are we seeing the same pairings again and again - and we're not even talking about sequels here.
While familiarity between co-stars can be advantageous and makes the director's work that much easier, when will such partnerships lose their freshness?
For instance, Elizabeth Olsen and Aaron Taylor-Johnson reunite as siblings in Avengers: Age Of Ultron after playing husband and wife in last year's Godzilla.
We look at cinema's other hook-ups and check out if their chemistry justifies their repeat couplings.
AARON TAYLOR-JOHNSON & ELIZABETH OLSEN
In the Joss Whedon-directed Avengers: Age Of Ultron, now showing in cinemas, she's Wanda "Scarlet Witch" Maximoff and he's her twin brother Pietro aka Quicksilver.
The 26-year-old US actress and 24-year-old Brit actor were last seen playing a married couple in 2014's Godzilla.
They were offered their Avengers roles after they finished shooting the Gareth Edwards-directed monster flick, and reportedly sounded each other out before saying yes to Whedon.
Olsen told Bang Showbiz: "It was awesome working with (Aaron) a second time. I love him and his wife (director Sam Taylor-Johnson), and spent lots of time with them when we were shooting in London."
Taylor-Johnson told Reuters that it "helped a lot to have a partner in crime" as it was "overwhelming and daunting stepping onto that set" as newcomers to the superhero franchise.
The pair clearly have great chemistry off-screen, as evidenced by the various video interviews they did together for Age Of Ultron and during the Godzilla publicity tour last year.
Sadly, they don't quite sizzle on the big screen both times.
For Godzilla, one can blame the script for keeping them physically apart - they were only together at the beginning and end of the movie - and the epic titular monster for stealing their thunder.
Olsen and Taylor-Johnson are inseparable in Age Of Ultron, and Whedon's script not only plays up the action but also offers much characterisation.
On their own, they are great. Together, now that's a different story.
Scarlet Witch and Quicksilver may be important players who bring the superheroes down, yet their performances feel perfunctory.
Sparks just don't fly between them.