Insoluble monomolecular films at the air–water interface (Langmuir monolayers) exhibit a variety of textures in tilted condensed domains in both one phase and two coexisting phase regions. They include mosaics, stripes, stars, and boojums. The appearance of these striking textures are a manifestation of a long ranged orientational order of the constituent amphiphilc molecules in mm length scales. It is well known that the textures in monolayers can be understood in terms of a Landau–de Gennes theory of tilted hexatic phases. Besides the above mentioned textures, there are inverse boojum, i.e., liquid droplets (in the L1 phase) or gas bubbles (in the G phase) surrounded by an anisotropic tilted condensed (L2) phase. They have been observed in polarized fluorescence microscopy and atomic force microscopy. Inverse boojums are virtual topological defects the texture of tilt director, since they are created and located inside the isotropic substance if we extend the cdirector (the projecton of the molecular axis on the water surface) pattern in the monolayer into the isotropic gas or liquid domain. The liquid condensed domains with no internal textures in a liquid expanded (or gas) phase form a hexagonal superstructure and the formation was explained by the line tension between the two coexisting phases and long range electrostatic repulsion between domains. There has been, however, less studied on the interactions between isotropic inclusions surrounded by a tilted liquid condensed phase. In ref. 4, Fang et al. observed an interesting alignment of inverse boojums in Langmuir monolayers of pentadecanoic acid. While this ovservation seems to be closely associated with the problem that is posed by colloidal particles suspended in an anisotropic fluid, it has not been examined theoretically before. In this note we present a simplified model for the alignment of inverse boojums. It is shown that an inverse boojum constitutes a topological dipole (a pair of point disclinations with opposite topological charges (winding numbers)) and that the dipole– dipole interaction arising from the topological charges leads to the alignment of the inverse boojums. First, we follow the the approach of Fang et al. for the minimization of the total energy for a two-dimensional gas cavity of an isotropic phase surrounded by an orientationally ordered liquid condensed phase (Fig. 1):