By People Staff
May 13, 2008 12:00 AM

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Shayne Dahl Lamas got more than the final rose — she also got a marriage proposal.

After sending Chelsea home, Bachelor Matt Grant got down on one knee and popped the question to Lamas, an actress from Los Angeles, with a 2.85-carat Tacori platinum and diamond eternity ring on Monday night’s season finale of ABC’s The Bachelor: London Calling.

“My knees gave out and I started shaking,” Lamas told PEOPLE about the proposal. “It was a fairytale proposal like I’ve always dreamed about. I forgot that there were cameras around. In that moment, it was just Matt and I and it was the most amazing moment of my entire life.”

Grant, 27, a global financier from England, simply described the moment as “incredible. It was a beautiful setting, a beautiful day. Shayne looked absolutely exquisite.”

The 22-year-old, whose father, actor Lorenzo Lamas, previously told Grant his daughter might not be prepared for marriage, said she’s not too young but also isn’t rushing into anything just yet. “There’s still a lot of growing to do in our relationship. We will not tie the knot until I am mentally and physically prepared as well as Matt,” she said.

One thing they don’t have to worry about: meeting the in-laws, which both have already done. “I think both of our families have welcomed one another with open arms,” Lamas said. “And they’re both very excited for us, for our new lives and for us to be part of the big family.”

The couple has yet to set a date. In fact, they say wedding talk is a bit premature since they haven’t been able to publicly see each other for the past few months while the show aired.

To keep their relationship under wraps, Grant and Lamas secretly met on various occasions at a house in Palm Springs, Calif., where they relaxed, playing board games and watching TV. “Shayne is absolutely terrible at Trivial Pursuit,” Grant joked. “I love her very much. I would die for this woman but she cannot play!”

They’ve also had some near-misses in Los Angeles, where Lamas currently resides. On one shopping trip, she had to bolt out of Barneys New York after calling Grant and discovering he was eating in the department store’s caf at the exact time.

As for where the two will settle down, “We’ll be going across the Atlantic and spending time in London and maybe New York and L.A.,” Grant said.

“The key is giving it the right time and not rushing into anything,” he said. “We’re just starting our relationship,” Lamas added. “We’re not putting any pressure on ourselves… but we’re 100 percent in this relationship right now.” –Eunice OhCraig Sjodin/ABC