In William Shakespeare's play "Romeo and Juliet," the ages of the two titular characters are not explicitly mentioned. However, it is generally assumed that they are teenagers. Juliet is often portrayed as being around 13 years old, while Romeo's age is not specified but is believed to be around 16 or 17.
As for how they managed to get married without their parents knowing, it all happens in Act II, Scene 6 of the play. Romeo and Juliet's marriage takes place in secret, facilitated by Friar Laurence. Here's a summary of how it unfolds:
After meeting and falling in love at a party, Romeo and Juliet decide to get married, despite knowing their families (the Montagues and Capulets) are bitter enemies.
Romeo confides in Friar Laurence about his love for Juliet and his desire to marry her. The friar initially questions Romeo's feelings, as he was in love with Rosaline just the day before. Nonetheless, he agrees to marry them, hoping that their union might eventually reconcile their families.
Juliet visits Friar Laurence seeking his help. She is distressed about her impending marriage to Paris, a suitor her parents have arranged for her. To avoid this marriage, she threatens to kill herself. The friar devises a plan to assist her.
Friar Laurence marries Romeo and Juliet secretly in his cell. The marriage ceremony is not shown on stage, but it is implied to have taken place off-stage.
After the marriage, Romeo and Juliet continue to keep their relationship a secret from their families.
It's important to note that the secrecy surrounding their marriage plays a significant role in the tragedy that unfolds in the rest of the play. The lack of communication between the young lovers and their families leads to misunderstandings and ultimately contributes to the tragic outcome of the story.