He did the marriage contract with a girl but did not tell his parents, and he wants to do the marriage contract again in their presence
Question

                I performed nikah with a girl without disclosing it to my parents 8 months back but now my parents are convinced and i would like to perform nikah again with the same girl in the presence of my parents without letting them know about my previous nikah so could you kindly explain us can we marry again according to islamic law and shariah.
Praise be to Allah.
      Firstly: 

    If the first marriage contract fulfilled the conditions and 
    necessary parts, namely the consent of both parties, the presence of the 
    woman’s guardian and the testimony of two Muslim witnesses of good 
    character, then this is a valid marriage contract with all that results from 
    it. But if any of these conditions were not met, then it is an invalid 
    marriage contract and must be repeated. 

    Secondly: 

    It is no secret that the parents have great rights and should 
    be honoured and treated kindly. Hence it is essential to consult them with 
    regard to the matter of marriage and to strive to please them as much as 
    possible. 

    If no obvious negative consequences will result from telling 
    them about the previous marriage contract, then it is better to tell them 
    about that and strive to please them. It is more important to tell them if 
    the wife is pregnant, so as to ward off accusations and suspicion. 

    But if telling them will lead to obvious negative 
    consequences, such as the fear that they would sever ties with you and the 
    like, then you can pretend to do the marriage contract in their presence or 
    have it registered officially if it was not registered. 

    What is meant by pretending to do the marriage contract is 
    that the guardian of the woman should say: I give my daughter or sister So 
    and so to you in marriage, and you should say: I accept to marry So and so 
    -- in the presence of two witnesses of good character, but you should inform 
    the guardian that this new marriage contract does not really mean anything 
    and that what counts is the first one. 

    And Allah knows best.