An integrated hydrocracking process for production of olefinic and aromatic petrochemicals from a hydrocarbon feedstock comprising crude oil, the process comprising: treating the feedstock comprising crude oil and a residual liquid product in a first hydrocracking zone in the presence of hydrogen under conditions effective to produce a first effluent having an increased hydrogen content; separating the first effluent into a LPG comprising stream and a liquid phase stream; separating said LPG comprising stream into one or more streams chosen from the group of a stream comprising hydrogen, a stream comprising methane, a steam comprising ethane, a stream comprising butanes, a stream comprising propane, a stream comprising C1-minus, a stream comprising C3-minus, a stream comprising C1-C2, a stream comprising C3-C4, a stream comprising C2-C3, a stream comprising C1-C3, a stream comprising C1-C4, a stream comprising C2-C4, a stream comprising C2-minus, a stream comprising C4-minus; further processing one or more of the streams thus obtained in a steam cracker unit and at least one unit chosen from the group of, a butanes dehydrogenation unit, a propane dehydrogenation unit, a combined propane-butanes dehydrogenation unit, or a combination of units thereof to produce mixed product stream(s), wherein one or more streams chosen from the group of said stream comprising ethane, said stream comprising C2-minus and said stream comprising C1-C2 is fed to said steam cracker unit, and wherein said propane and butane comprising streams are fed to said dehydrogenation units; feeding the mixed product stream(s) from said steam cracker unit and at least one unit, chosen from the group of said butanes dehydrogenation unit, said propane dehydrogenation unit and said combined propane-butanes dehydrogenation unit, or a combination of units thereof, to a second separation section; thermally cracking the liquid phase stream in a resid hydrocracking zone to produce a slurry intermediate product; separating the mixed product stream(s) for recovering olefins and aromatics. treating the feedstock comprising crude oil and a residual liquid product in a first hydrocracking zone in the presence of hydrogen under conditions effective to produce a first effluent having an increased hydrogen content; separating the first effluent into a LPG comprising stream and a liquid phase stream; separating said LPG comprising stream into one or more streams chosen from the group of a stream comprising hydrogen, a stream comprising methane, a steam comprising ethane, a stream comprising butanes, a stream comprising propane, a stream comprising C1-minus, a stream comprising C3-minus, a stream comprising C1-C2, a stream comprising C3-C4, a stream comprising C2-C3, a stream comprising C1-C3, a stream comprising C1-C4, a stream comprising C2-C4, a stream comprising C2-minus, a stream comprising C4-minus; further processing one or more of the streams thus obtained in a steam cracker unit and at least one unit chosen from the group of, a butanes dehydrogenation unit, a propane dehydrogenation unit, a combined propane-butanes dehydrogenation unit, or a combination of units thereof to produce mixed product stream(s), wherein one or more streams chosen from the group of said stream comprising ethane, said stream comprising C2-minus and said stream comprising C1-C2 is fed to said steam cracker unit, and wherein said propane and butane comprising streams are fed to said dehydrogenation units; feeding the mixed product stream(s) from said steam cracker unit and at least one unit, chosen from the group of said butanes dehydrogenation unit, said propane dehydrogenation unit and said combined propane-butanes dehydrogenation unit, or a combination of units thereof, to a second separation section; thermally cracking the liquid phase stream in a resid hydrocracking zone to produce a slurry intermediate product; separating the mixed product stream(s) for recovering olefins and aromatics.