Merely Taylor Swift's hot new boyfriend, he is not.

British actor Joe Alwyn, 27, has been trending upward in Hollywood of late and is set to break out in a big way this Oscar season with several pivotal new roles. So what should you know about the English star? We've got you covered.

This Brit is a (tall) drink of water

The currently bearded, London-born actor is the son of a documentary filmmaker father and a psychotherapist mother. Shortly after graduating from the Royal Central School of Speech and Drama, the 6-foot-1 star scored the lead playing an Iraqi war veteran in 2016's "Billy Lynn's Long Halftime Walk," directed by renowned filmmaker Ang Lee. Not a shabby start.

Lee told USA TODAY he was drawn to Alwyn's soulfulness and "all-American" looks. "A minute or two into the first scene, it was pretty obvious," Lee said. But "he was a little skinny back then – I knew we had to beef him up."

Margot Robbie and Emma Stone just can't quit him (in different movies)

Alwyn will have released no fewer than four new films by the end of the year and doesn't seem afraid to tackle controversial roles. In August's "Operation Finale," he played Nazi sympathizer Klaus Eichmann, son of Adolf Eichmann, the SS officer and Holocaust architect who went into hiding in Argentina after World War II.

This holiday season, Alwyn plays a pivotal role in the gay-conversion therapy drama "Boy Erased" (in theaters now) as the first boy a closeted teen (Lucas Hedges) falls for in college. He's a handsome courtier beloved by Queen Elizabeth I (Margot Robbie) in "Mary Queen of Scots" (out Dec. 7) and is the regal object of Emma Stone's affection in the 18th-century royal drama "The Favourite" (now showing).

The blue-eyed blond has won over the fashion crowd

Did we mention he's also the face of Prada right now? (In case you were wondering if the fashion world has come calling.)

OK, OK, here's the Taylor Swift part

We learned Swift was dating Alwyn in May 2017, though the pair kept things remarkably under the radar for months – a strategy the pop star employed after her much-Instagrammed relationship with DJ Calvin Harris went bust (as did her very public rebound with Tom Hiddleston). Then came "Reputation," Swift's hit album released last November, which has several tracks hinting at their love story – including "Gorgeous," a song that has the pop star waxing poetic over her beau's "ocean blue eyes."

They're still not revealing ... much

Alwyn has stayed pretty tight-lipped about Swift, even as his star rises in Hollywood. “I’m aware people want to know about that side of things,” he told British Vogue. “I think we have been successfully very private, and that has now sunk in for people ... I really prefer to talk about work.” While they've yet to pose on the red carpet together, the couple is here for each other's work: Alwyn has been spotted at several stops of Swift's just-concluded 2018 stadium tour, and in the last few weeks, the singer has accompanied Alwyn to events for "The Favourite."

More:Taylor Swift's boyfriend Joe Alwyn stands behind her political posts: 'I think it's great'

And 'The Favourite' could take him to the next level

Alwyn is a supporting player in "The Favourite," a darkly comedic tale chronicling subterfuge at play between Queen Anne's (Olivia Colman) dueling ladies-in-waiting (Rachel Weisz and Stone). The film, directed by Yorgos Lanthimos ("The Lobster"), is a critical darling and is destined to be an, er, favorite this Oscar season. So expect to see a lot of exposure for Alwyn as part of the super-tight "Favourite" crew.