Only a select 650 of the 1,900 guests at the ceremony were invited to Queen Elizabeth II’s post-wedding luncheon, but Us Weekly spoke exclusively to a few of them about the elite affair. "We had to hand our phones in to the cloakroom and were given them back after,” one guest told the magazine. The insider said that both Prince Charles and Prince William made speeches and the father of the groom talked about “how proud he was of Kate and welcomed her into the family.” The guest added that the bride “was just immaculate! She had a huge smile on her face the whole time and was just beaming."Another source at the reception told Us Weekly that the queen’s spread was chock-full of treats: “There was everything you could imagine to eat! Plenty of Champagne and of course there was caviar! What's a royal party without caviar?"The guests reportedly feasted on canapés including: quail eggs with celery salt, Cornish crab salad on lemon blini, pressed duck terrine with fruit chutney, Scottish langoustines with lemon mayonnaise, and miniature Yorkshire pudding with roast fillet of beef and horseradish mousse, the AP reported.Then, the eight-tier fruit wedding cake was revealed, as well as the chocolate biscuit variety William requested from McVities' Cake Company.After the party, the bride and groom headed to Clarence House to change for the day’s events.Next up for the couple: Prince Charles’ even more exclusive 300-guest dinner party.