No, Kajol and Shah Rukh Khan have never been romantically involved.
While their on-screen chemistry and real-life friendship have often led to rumors of a romantic relationship, both actors have always maintained that their bond is purely professional and platonic.
They have been friends for over two decades, having met on the sets of their first film together, Baazigar (1993). They have since starred in numerous successful films together, including Dilwale Dulhania Le Jayenge (1995), Kuch Kuch Hota Hai (1998), and Kabhi Khushi Kabhie Gham... (2001), solidifying their status as one of Bollywood's most beloved onscreen couples.
Despite their close friendship, Kajol has been married to Ajay Devgn since 1999, while Shah Rukh Khan is married to Gauri Khan. Both couples have strong and lasting relationships, further debunking the rumors of a romantic connection between Kajol and SRK.