"Mary Magdalene according to the Roman Catholic Church is all of the following:
the sister of Martha and Lazarus of Bethany,
the penitential woman who washed the feet of Jesus with oil and her hair,
and Mary Magdalene who followed our Lord and had the seven demons expelled from her.1 Scriptural references connect all three. (In the Eastern Church these are all seen as three separate persons. In the Protestant Church she is seen as two persons (they are reluctant to identify Mary of Bethany as a sinner, as it is said perhaps they failed to grasp the complete significance of the forgiveness of sin.) 2
Mary Magdalene is mentioned among the women who accompany Christ and minister to Him (Luke 8:2-3), seven devils had been cast out of her (Mark 16:9), she stands at the foot of the cross (Mark 15:40; Matthew 27:56; John 19:25; Luke 23:49). She saw Christ laid in the tomb, and she was the first witness of the Resurrection. 2
It may hold that all are the same, noting just a few of the related verses:
In the Gospel of Luke 7:37-50 is the anointing of Christ's feet by a woman, a "sinner" in the city.
Immediately afterwards St. Luke describes a missionary circuit in Galilee and tells us of the women who ministered to Christ, among them being "Mary who is called Magdalene, out of whom seven devils were gone forth" (Luke 8:2); but he does not tell us that she is to be identified with the "sinner" of the previous chapter. If we were left with Luke we may not connect the two, as he may not have wanted to connect Mary of Bethany with the sinner and defame the living (as he elsewhere conceals St. Matthew with his other name: Levi the publican/tax collector). 2
But, St. John clearly identifies Mary of Bethany with the woman who anointed Christ's feet (12; cf. Matthew 26 and Mark 14). It is remarkable that already in 11:2, St. John has spoken of Mary of Bethany as "she that anointed the Lord's feet." 2
It is natural series of events that form a consistent whole; the "sinner" initially seeks for pardon; she is described immediately afterwards as Mary Magdalene "out of whom seven devils were gone forth"; shortly after, we find her "sitting at the Lord's feet and hearing His words." 2
Mary Magdalene is honored with sainthood and is a model for us in her humility, openness to grace, and growth in holiness.
(For more detailed information check NewAdvent.org)
1Saunders, Fr. William, Who Really Was Mary Magdalene? Catholic Culture.
2Knight, Kevin. Mary Magdalen. New Advent Catholic Encyclopedia,