Keira Knightley and James Righton are seen in Soho on July 1, 2012 in New York City. Credit: Alo Ceballos/FilmMagic

Keira Knightley can't believe her luck.

While promoting her new movie, Anna Karenina, on Good Morning America Nov. 9, the 27-year-old actress admitted she can't stop admiring her engagement ring from Klaxons keyboardist James Righton. (The bauble is worth an estimated $40,000.)

"I keep doing this," Knightley said as she waved her left hand back and forth. "It's the engagement shuffle."

The British star added, "It's a lovely ring, isn't it?"

The Academy Award nominated actress also revealed that she hasn't yet settled on a wedding date. "We're both working too hard, so I'm just enjoying this bit."

Righton, 28, proposed in May after more than a year of dating. "Honestly, they're good for each other," a pal told Us Weekly earlier this year. "They love being engaged."

Prior to her relationship with Righton, Pride & Prejudice star Knightley was in five-year relationship with actor Rupert Friend. They split in December 2010.