Gugulethu Sophia Mbatha

Does she like playing little sisters?
Gugu Mbatha-Raw first came to the attention of American genre audiences as Martha Jones' (fellow Femme Fantastique Freema Agyeman) younger sibling Tish on Doctor Who.
And, when JJ Abrams cast his series UnderCovers, Gugu auditioned for the role of Samantha Bloom's kid sister Lizzy!
Apparently, Abrams thought "Kid sister? The hell with that! She's the LEAD!"
Wise man, that JJ!
She was the best thing about the show!  ;-)
Besides doing a lot of genre tv and movies (see below), this graduate of the acclaimed Royal Academy of Dramatic Arts performed to rave reviews both on the London stage and Broadway including Cleopatra in Antony and Cleopatra, Juliet in Romeo and Juliet, and Ophelia in Hamlet (which went from the West End to Broadway)!
A Fantastic Femme to watch!

Genre credits include...
Cloverfield Paradox
A Wrinkle in Time (Dr Kate Murry)
Beauty and the Beast  [2017] (Plumette)
Black Mirror "San Junipero" (Kelly Booth)
Jupiter Ascending (Famulus)
Touch (Clea Hopkins)
Odd Thomas (Viola)

UnderCovers (Samantha Bloom)

BoneKickers (Viv Davis)

Bad Girls (Fidelity Saunders)

Trial Retribution (Jenny Miller)

Disarming Britain: FallOut (Shanice Roberts)

Doctor Who (Letitia "Tish" Jones)

Spooks aka MI-5 (Jenny)

Check out...
Gugu Mbatha-Raw (FanSite)
Adoring Gugu (FanSite)
Profile at RADA (via Wayback Machine)
Profile on the Undercovers page at NBC

Kristin Laura Kreuk

Kirsten has a good acting range, and handled the action sequences in the Street Fighter: the Legend of Chun-Li adquately.
I didn't expect Michelle Yeoh-level stuntwork.
Kirsten looked convincing in the medium shots and closeups.
At least she wasn't worse than Ming-Na in the 1994 flick! (Cute, but terrible fighting skills!)

Currently, she's starring on the CW in the remake of the 1990s series Beauty and the Beast.
While I'm hoping it'll last, making the so-called "beast" a handsome guy with a scar and a temper instead of a creature who Catherine helps tame his beastly tendencies with her love indicates a serious lack of faith in the audience to accept a physically-unattractive, but intelligent and emotionally-open, man as a romantic lead the way fans of the original series did.

Trivia: Kristen as Lana Lang, played opposite Annette O'Toole (who had played Lana in Superman III) as Martha Kent in Smallville, marking one of the few times two people who played the same non-costumed character appeared together onscreen. (Yes, there have been episodes of series where, for example, Adam West or Buster Crabbe appeared opposite newer versions of Batman or Buck Rogers, but how often did actors playing the two generations of supporting characters appear together?)

Genre appearances include:
Beauty and the Beast (Catherine Chandler)
Chuck (Hannah)
Ben Hur (Tizrah)
Street Fighter: the Legend of Chun-Li(Chun-Li Huang)
Legend of EarthSea(Tenar / Arha)
Smallville(Lana Lang-Luthor)
Snow White: Fairest of Them All(Snow White)

Other actresses to play Catherine Chandler include:
Linda Hamilton in Beauty and the Beast (1987-1990)

Other actresses to play Chun-Li include:
Ming-Na Wen as Chun-Li Xang in Street Fighter(1994)
Chingmy Yau as Chun May in Future Cops

Other actresses to play Lana Lang include:
Annette O'Toole in Superman III
Diane Sherry in Superman: the Movie
Emily Procter in Lois & Clark: the New Adventures of Superman
Stacey Hadiuk in Superboy(1988-92)
Bunny Henning in The Adventures of Superboy (1961) [UnSold Pilot]

Other actresses to play Tizrah:
Cathy O'Donnell in Ben-Hur(1959)
Kathleen Kay in Ben-Hur(1925)

Other actress to play Tenar / Arha:
Mariska Hargitay in Tales of EarthSea