ANSWER: St. John the Baptist. 

He leaped in the womb when the Blessed Mother, who was pregnant with the Lord, arrived at the house of John’s parents, Elizabeth and Zechariah. Later in life, John would baptize Jesus in the Jordan only to see the heavens opening up, the Holy Spirit descending upon Jesus like a dove. Then he heard these words from heaven: “Thou art my beloved Son; with thee I am well pleased.” (Luke 3:21) RSV-CE