Viewers were far more intrigued by what was going on from the neck up, however, with one tweeting: "Will Smith doesn't look like Will Smith."
Another was a more complimentary, saying his dewy skin harks back to when he debuted on The Fresh Prince of Bel-Air, while one more described his appearance as "robotic".
One social media user joked that he looked like "a Pixar version of himself".
The star appeared to be in the same outfit he wore to the London premiere of King Richard on the same night, where the actor was snapped on the red carpet o with co-stars Demi Singleton and Saniyya Sidney.
King Richard is based on the life of Richard Williams, played by Will, who helped his daughters, Serena and Venus Williams, in their early careers as professional athletes.
Speaking to hosts Zoe Ball and Jermaine Jenas, Will revealed Serena and Venus weren't keen on the film at first.
"Venus and Serena, when the idea came up, they were a little hesitant, and they said they would executive produce the film but would wait until they saw the movie until they decided to put their names on it," he said.
"But they were so honoured, they agreed to put their names on the film. And when you make a movie like this there really is only one audience, and it's the people you are depicting.
"And when they walked out of that theatre and agreed to put their names on this movie, it was one of the highest points in my career," he said.
Smith has been making headlines lately after several bombshell revelations in his memoir were released.
In an excerpt from his new memoir, Me, published on People, Smith reveals the fraught setting of his early life in Philadelphia with his father, Willard Carroll Smith Sr, and mother Caroline Bright — and how it affected his later life with his father, whom he cared for while the elder man was battling cancer.
"My father was violent, but he was also at every game, play, and recital," Smith, 53, writes. "He was an alcoholic, but he was sober at every premiere of every one of my movies. He listened to every record. He visited every studio."
He continues: "When I was nine years old, I watched my father punch my mother in the side of the head so hard that she collapsed. I saw her spit blood." The two eventually split when Smith was a teen and divorced in 2000.
Smith's personal life has been more in the open as of late than ever before. He admitted recently to having suicidal thoughts while filming a YouTube series about fitness and weight loss, and has been airing the inner workings of his open marriage with wife Jada Pinkett, revealing in September that his own personal conception of polyamory at one point was "a harem of girlfriends" including Halle Berry and Misty Copeland.
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