After his elder brother died,
Henry became next in line to be King.
His father(King Henry VII) died in 1509 and the 18 year old Prince became King.

Henry was seen to be (in that era) vigorous and hansome. He was an incredible athelete and loved jousting and hunting.

He was also considered to be a very well educated man, he spoke 4 languages, wrote poetry, and knew a lot about religion studying also latin, maths, music, astronomy and cosmology. . .