(written from a Production point of view)
Carlo Ancelotti (born 10 June 1959; age 62) is an Italian soccer manager who appeared as a doctor at Starbase Yorktown in Star Trek Beyond. He got the role because he was a friend of Zoë Saldana and her husband.  His scenes were filmed in Vancouver.    He was not heavily made up for the part.  According to Ancelotti, "I play the part of a scientist who has to examine an alien. It was good, I pretended it was Cristiano Ronaldo in front of me...” 
Ancelotti is most famous for managing the Italian club A.C. Milan (2001-2009), the Spanish club Real Madrid (2013-15), and the German club Bayern Munich (2013-15). He won the UEFA Champions League three times (twice with Milan and once with Real Madrid), and numerous domestic titles. He is currently managing the English team Everton.