A mounting assembly (150) for supporting objects, the mounting assembly (150) comprising: at least two adjacent mounting panels (100), each of the mounting panels (100) having a first front surface (102), a second rear surface (104) and a peripheral edge extending between the first front surface (102) and the second rear surface (104); at least one recess (106) provided by the peripheral edge of each of the mounting panels (100), the at least one recess (106) of each of the mounting panels extending from the first front surface (102) towards the second rear surface (104); at least one aperture (108) in the first front surface (102) of each of the mounting panels (100); at least one key (114); and at least one mounting support (326) receivable in the at least one aperture (108) of either of the mounting panels (100), the at least one mounting support (326) configured to support one or more objects. The recesses (106) of the adjacent mounting panels (100) align to form a keyhole (115) and the key (114) is inserted into the keyhole (115) in a direction generally perpendicular to the first front surface (102) thereby interlocking the adjacent mounting panels (100) together.