King Charles III marked another first in his reign this week, unveiling the first official portrait of himself since his coronation last year. Charles and his wife Queen Camilla were on hand Tuesday as the king's portrait was unveiled at Buckingham Palace. The portrait, which stands over 6 feet tall, was painted over the course of three years by Jonathan Yeo, a U.K.-based artist, according to the palace. The painting features a striking red background and shows Charles wearing the uniform of the Welsh Guards, of which he was made Regimental Colonel in 1975, according to the palace.