I think he most definitely has Capricorn Ascendant. It's why he studied the Classics at Cambridge (Capricorn loves all things Classic and Ancient/History based), why he used to get cast in all those period pieces, why he looks so great and says he prefers wearing suits (men w/ Capricorn in their charts perfect the classic 3 piece suits like none other), why he keeps getting better looking with age (Cap looks better older/ more refined), why his cheekbones are the first thing you notice about him (Capricorn rules the protruding cheekbone look), and why he is funny (Capricorns are actually hilarious comedians).
I suspect w/ Saturn moving into Capricorn in Jan 2018, that his career will completely take off, b/c when Saturn conjuncts important points in your chart, the world loves you and applauds you/ you can do no wrong. The opposite happens when a Saturn transit is opposite to a point in your chart, then everything falls apart and people despise you (aka Geminis Kanye West, Azalea Banks & Donald Trump), who are considered villains right now bc they experiencing this Sagittarius Saturn transit in direct opposition to their sun signs.
I totally agree with the capricorn prediction. He is plain capricornian. Also all his ladies look very cancer, his descendent.