By baptism we confess our faith in the death and resurrection of Jesus Christ, and testify of our death to sin and of our purpose to walk in newness of life. Thus we acknowledge Christ as Lord and Saviour, become His people, and are received as members by His church. Baptism is a symbol of our union with Christ, the forgiveness of our sins, and our reception of the Holy Spirit. It is by immersion in water and is contingent on an affirmation of faith in Jesus and evidence of repentance of sin.
Here you can photos from the day Jessica and Anastasia got baptised in to orthodox christianity.