Here is a list of Bollywood stars who have portrayed both romantic and sibling relationships in different films.
Social MediaThey played twin siblings in Josh (2000), later turned lovers in Mohabbatein (2000) and Devdas (2002)
They played lovers in Gunday (2014) and then became siblings in Dil Dhadakne Do (2015). They again played husband-wife in Bajirao Mastani (2015).
They romanced in Desi Boyz (2011) and later played step-siblings in Race 2 (2013)
They played a couple in Om Shanti Om (2007), later became a brother-sister duo in Housefull (2010)
They played lovers in Mujhe Kuch Kehna Hai (2001). Years later, they played brother and sister-in-law in Golmaal 3 (2010)
They romanced in Mr. & Mrs. Khiladi (1997), then portrayed siblings in Ek Rishtaa: The Bond of Love (2001)
They played lovers in Bol Bachchan (2012), later became siblings in All Is Well (2015)
They romanced in Ek Ladka Ek Ladki (1991), then played siblings in Hum Saath-Saath Hain (1999)