Keira Knightley shows off engagement ring

Keira Knightley has been all smiles since announcing her engagement to James Righton, who plays the keyboard in the band Klaxons. According to People Magazine, the couple was holding hands in London while Knightley flashed her new engagement ring earlier this week. The gorgeous sparkler is a circular diamond on a thin band.

According to Metro, the couple is having a tough time hiding their affection. They were just spotted in a London taxi looking completely smitten. The 27-year-old actress donned a denim jacket with a black floor-length dress for her night out with soon-to-be hubby Righton, who looked equally charming in T-shirt, chinos and trainers.

One thing's for sure, the duo is clearly excited to say "I do."

Those who like the design of the ring, but do not want to break the bank to purchase it, can opt for fashion jewelry such as the Sterling Silver Birthstones Simulated Women's Ring. This not only gives a similar look to the ring, but the bright blue stone gives it an added touch.